COB stands for Chip-on-Board and refers to the direct contact mounting of a bare LED chip with a substrate (such as silicon carbide or sapphire) to produce an LED array. COB LEDs are basically the manufacture of multiple LED chips directly bonded to a substrate to form a single module.

The gimbal design of the COB 110V 5W led ceiling light downlight allows you to illuminate the wall accordingly. COB LED downlight light fittings can be installed in your home and also can be used in hotel, and shopping mall projects, widely used in different types of projects.

The Rodec Light COB LED ceiling downlight light features an ultra-thin design to provide better light output and anti-glare. LED light downlight replacement is important in your life. Choose the color temperature according to your project, Rodec Light can provide COB downlights in warm white, neutral white, and cool white types with a color rendering index >80 and perfect compatibility with your local thyristor dimmer.

    • Gimbal COB LED Downlight
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      • Gimbal COB LED Downlight

      • Slim lamp body, easy to keep in stock Install height only 38mm, fit with all kinds ceiling Twist angle from 0-30° will match different scene requirement Aluminum heat sink with prefect great dissipation High-performance:IP40 CRI>80 Dimmable is available Epistar chip with three years warranty CE ROHS certification approval
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Gimbal COB LED Downlight & COB LED Ceiling Spot Light

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Rodec Light is a professional and experienced China led downlight manufacturer. We have about 15 years history for producing LED downlight, include, led recessed downlight, led ceiling downlight, LED surface mounted downlight, dimmable downlight, integrated led downlight, waterproof downlight and eyeball downlight, etc.

COB LED Downlight: The Future of Lighting Technology

Lighting technology has come a long way since the invention of the light bulb. The latest breakthrough in this field is the COB (Chip on Board) LED downlight. It offers a new level of energy efficiency and brightness, making it a popular choice for both residential and commercial use.

What is a COB LED Downlight?

A COB LED downlight is a type of LED lighting that utilizes multiple LED chips that are mounted on a single board. This design provides higher brightness and more efficient heat dissipation compared to traditional LED lights. COB LED downlights can produce light with a higher color rendering index (CRI), which means the colors in a room will appear more vibrant and natural.

Advantages of COB LED Downlights

  1. Energy Efficiency: COB LED Downlights are highly energy efficient, which means that they use less electricity to produce the same amount of light as traditional lighting sources.
  2. Long Life: COB LED Downlights have a longer lifespan than traditional lighting sources, reducing the need for frequent replacements.
  3. High Brightness: COB LED Downlights can produce a high level of brightness, making them ideal for general lighting in residential and commercial spaces.
  4. High CRI: COB LED Downlights have a high color rendering index (CRI), which means that they produce light that is more true to life, with more accurate colors.
  5. Low Heat Emission: COB LED Downlights emit very little heat, which makes them safer to use and reduces the risk of fire.
  6. Environmentally Friendly: COB LED Downlights do not contain harmful substances, such as mercury, making them a more environmentally friendly option.
  7. Easy Installation: COB LED Downlights are easy to install, and many are designed for retrofit applications, which means that they can be installed in existing light fixtures without the need for major renovations.

COB LED downlights are the future of lighting technology, offering a multitude of benefits over traditional lighting sources. With their high level of energy efficiency, long lifespan, and brightness, COB LED downlights are an excellent choice for any home or business looking to upgrade their lighting.

What is a COB LED Downlight?

A COB LED Downlight is a type of LED (light emitting diode) lighting fixture that is commonly used for indoor lighting purposes. COB stands for “Chip on Board,” which means that multiple LED chips are integrated onto a single board to form a single lighting module. COB LED Downlights are designed to be mounted in the ceiling, and they emit light downwards, making them ideal for general lighting in residential and commercial spaces.

How does a COB LED Downlight work?

A COB LED Downlight works by using a number of tiny LED chips that are integrated onto a single board. The board is typically mounted inside a housing, and the housing is designed to direct the light emitted from the LED chips downwards. The LED chips produce light when an electric current passes through them, and the current is supplied by a driver or power supply. Some COB LED Downlights may also include additional components, such as lenses or reflectors, to control the beam pattern or distribution of the light. The overall operation of a COB LED Downlight is similar to that of other LED lighting fixtures, but the COB design allows for higher efficacy and a more compact form factor.

How is a COB LED Downlight different from traditional LED downlights?

A COB LED Downlight is different from traditional LED downlights in a number of ways, including:

  1. Design: A COB LED Downlight integrates multiple LED chips onto a single board, while traditional LED downlights use individual LED chips that are mounted on a separate circuit board.
  2. Brightness: COB LED Downlights tend to be brighter than traditional LED downlights, as they use a larger number of LED chips to produce light.
  3. Heat Dissipation: The compact design of COB LED Downlights results in better heat dissipation compared to traditional LED downlights, which can help to extend the life of the LED chips.
  4. Efficiency: COB LED Downlights are more efficient than traditional LED downlights, as they can produce more light per unit of electricity.
  5. Cost: The cost of COB LED Downlights can be higher than traditional LED downlights due to the more complex manufacturing process and higher quality components.
  6. Compatibility: COB LED Downlights may be compatible with a smaller range of dimmer switches than traditional LED downlights, so it is important to check compatibility before making a purchase.
  7. Light Quality: COB LED Downlights can produce a more uniform and stable light output compared to traditional LED downlights, which can result in a higher color rendering index (CRI).

What is the life span of a COB LED Downlight?

The lifespan of a COB LED Downlight can vary, but on average, it is estimated to be around 50,000 to 100,000 hours. This lifespan is significantly longer than traditional lighting sources, such as incandescent bulbs, which typically have a lifespan of only 1,000 to 2,000 hours. However, the actual lifespan of a COB LED Downlight can be influenced by factors such as the quality of the components, the operating environment, and the usage patterns. To maximize the lifespan of a COB LED Downlight, it is important to use high-quality components and to install the downlight in a location that is protected from moisture and other environmental factors that can shorten the life of the LED chips.

How do I choose the right COB LED Downlight for my home or office?

When choosing a COB LED Downlight for your home or office, consider the following factors:

  1. Wattage: Choose a COB LED Downlight with the right wattage to match your lighting needs. The wattage will determine the brightness of the light, with higher wattage fixtures producing more light.
  2. Color temperature: Choose a COB LED Downlight with the right color temperature to match your lighting preferences. Color temperature is measured in Kelvins (K) and ranges from warm white (2700K) to cool white (5000K).
  3. Lumens: Choose a COB LED Downlight with the right lumens to match your lighting needs. Lumens are a measure of the amount of light produced by a fixture, and higher lumens means a brighter light.
  4. Beam angle: Choose a COB LED Downlight with the right beam angle to match your lighting needs. The beam angle will determine the spread of the light, with narrower beam angles producing a more focused light and wider beam angles producing a more dispersed light.
  5. Compatibility: Choose a COB LED Downlight that is compatible with your existing electrical system, dimmer switches, and other components.
  6. Durability: Choose a COB LED Downlight that is made with high-quality components and is designed to withstand the conditions of your home or office.
  7. Style: Choose a COB LED Downlight that fits with the style of your home or office and that complements your existing décor.
  8. Energy Efficiency: Choose a COB LED Downlight that is energy efficient and has a low power consumption to help lower your energy bills.

What are the different types of COB LED Downlights available in the market?

There are several types of COB LED Downlights available in the market, including:

  1. Fixed COB LED Downlights: Fixed COB LED Downlights are installed into a ceiling and cannot be adjusted once installed. They are available in various sizes and shapes to fit different ceiling fixtures and are ideal for use in areas that require a consistent and stable light source.
  2. Adjustable COB LED Downlights: Adjustable COB LED Downlights have a adjustable head that allows you to direct the light beam in different directions. They are ideal for use in areas that require adjustable lighting, such as task lighting or accent lighting.
  3. Dimmable COB LED Downlights: Dimmable COB LED Downlights can be adjusted to control the brightness of the light, making them ideal for use in areas that require flexible lighting, such as living rooms or bedrooms.
  4. Recessed COB LED Downlights: Recessed COB LED Downlights are designed to be installed into a recessed ceiling, providing a low-profile and seamless look. They are ideal for use in areas that require a discreet and unobtrusive lighting solution.
  5. Square COB LED Downlights: Square COB LED Downlights are designed to have a square or rectangular shape, making them ideal for use in modern and contemporary environments.
  6. Round COB LED Downlights: Round COB LED Downlights are designed to have a round shape, making them ideal for use in traditional and classic environments.
  7. RGB COB LED Downlights: RGB COB LED Downlights are equipped with RGB LED chips, allowing them to produce different colors of light. They are ideal for use in areas that require color changing lighting, such as home theaters or game rooms.

What are the installation requirements for a COB LED Downlight?

Installing a COB LED Downlight typically requires the following:

  1. Electrical knowledge and experience: Installing a COB LED Downlight requires basic electrical knowledge and experience, as well as a good understanding of local electrical codes and regulations.
  2. Ceiling space: COB LED Downlights require a minimum amount of ceiling space in order to be installed properly. Before installing a COB LED Downlight, make sure that there is enough space in the ceiling to accommodate the fixture.
  3. Recessed lighting can: A recessed lighting can is required for installing a COB LED Downlight in a recessed ceiling. The can is installed into the ceiling, and the downlight fixture is then installed into the can.
  4. Junction box: A junction box is required to provide a connection point for the electrical wiring and to protect the wiring from damage.
  5. Electrical wiring: Electrical wiring is required to connect the COB LED Downlight to the electrical supply. Make sure that the wiring is installed in accordance with local electrical codes and regulations, and that all connections are properly secured.
  6. Dimmer switch: If you want to control the brightness of the COB LED Downlight, a dimmer switch may be required. Make sure that the dimmer switch is compatible with the COB LED Downlight, and that it is installed in accordance with the manufacturer’s instructions.
  7. Tools: Tools that may be required for installing a COB LED Downlight include a drill, drill bits, screwdrivers, wire stripper, and wire nuts.

It is important to follow the manufacturer’s instructions when installing a COB LED Downlight, and to seek professional help if you are unsure about any aspect of the installation process. Improper installation can pose a risk of electrical shock, fire, or damage to the fixture, so it is important to take the necessary precautions to ensure a safe and successful installation.

Are COB LED Downlights energy efficient?

Yes, COB LED Downlights are considered energy efficient compared to traditional lighting options, such as incandescent or fluorescent lights. COB LED Downlights use less energy and generate less heat, which results in lower energy bills and a reduced environmental impact. They also have a longer lifespan than traditional lighting options, which means that they will need to be replaced less frequently, further reducing their environmental impact and cost over time. Additionally, many COB LED Downlights are also Energy Star certified, which means that they have been independently tested and verified to meet strict energy efficiency and performance standards.

What is the warranty on a COB LED Downlight?

The warranty on a COB LED Downlight can vary depending on the manufacturer and the specific product. In general, COB LED Downlights come with a warranty that covers defects in materials and workmanship for a specified period of time, usually ranging from 1 to 5 years. Some manufacturers may offer extended warranties or other types of protection plans for their COB LED Downlights. The warranty may also vary based on the type of COB LED Downlight and the location of its use.

It is important to review the warranty information provided by the manufacturer before purchasing a COB LED Downlight, to make sure that you understand the terms and conditions of the warranty and what is covered. If you have any questions or concerns about the warranty, you should contact the manufacturer or the retailer for more information.

LED downlight, as known as LED recessed downlight, LED ceiling downlight, is a light fixture that is installed into a hollow opening in a ceiling. When installed it appears to have light shining from a hole in the ceiling, concentrating the light in a downward direction with as a broad floodlight or narrow spotlight.

Because of LED downlight is a great lighting product can create perfect lights indoor, LED downlight becomes one of the most popular LED lighting products. It is widely applied in many places, include hotels, shopping malls, offices, restaurants, commercial places and residential places, etc.

What is a COB LED downlight?

Chip-on-Board or “COB” refers to the mounting of bare LED chips in direct contact with a substrate such as silicon carbide or sapphire to produce an LED array. COB LEDs offer many advantages over older LED technologies, such as surface mount device (“SMD”) LEDs or double in-line package (“DIP”) LEDs.

The COB LED downlight is designed for commercial new construction applications and each version features our high-lumen, high-efficiency COB LED design. The integrated LEDs are combined with dimmable drivers and high-transmission light diffusers to ensure uniform light output. Available options include reflectors and stepped baffles.

COB full name is Chip On Board, refers to the mounting of a bare LED chip in direct contact with a substrate (such as silicon carbide or sapphire) to produce LED arrays. SMD full name is surface mounted diode,The SMD type LEDs are mounted on an aluminum substrate and enveloped in an epoxy resin.

First, the price of SMD downlight is more competitive than COB downlight when they have same wattage. One of main reasons is becasue SMD chip are cheaper than COB chip.

Second, SMD downlight has higher lighting efficiency than COB downlight becasue the SMD chip has high efficiency than COB chip.

Third, SMD downlight has wide beam angle usually. The reason of this is becasue SMD downlight is with many SMD chips, it’s not easy to concentrate the light. So, SMD downlight is good to use at low height indoor area.

SMD downlight

SMD downlight is used worldwide not only becasue of the price is competitive, but also they have high lighting efficiency. They are widely applied in residential places and low height area.

IP44 SMD Downlight

COB downlight

First, COB downlight has more optical options because COB chips have higher “lumen density” than SMD chip, which means COB downlight only need one COB chip. It’s flexible to make COB downlight to have different beam angles by different reflectors. So, COB downlights are able to deliver light to ground when they are install at a high height ceiling.

COB LED Downlight

Second, Currently, LED COB chips have higher quality of light than LED SMD chip, such as higher CRI, lower color tolerance. LED COB chip can reach CRI as high as 97 on market, also COB downlight are required the color tolerance below 3 SDCM (Standard Deviation Colour Matching).

Nowdays, COB downlight not only are applied in residential places but also many commercial places, such as restaurants, hotels and shopping malls, etc. They have many optical options and higher quality of light, also they might be a little more expensive than SMD downlight。

SMD, or “Surface Mounted Device” LEDs, are the most common LEDs in the market. It’s highly popular due to its versatility. You can find it in light bulbs and string lights.

SMD downlights is more efficient than COB downlights because the light source produces higher lumens per watt, which means that they produce more light with a lower wattage.They produce a wider beam of light which is spread over a greater area. This means that less material is needed for the heat sink, which in turn means that they are more economical. The manufacturing procedure to make them is more expensive.

One of the most recent developments in LED, COB downlights or “Chip on Board” technology is a step forward more efficient energy use.

COB downlights provide a better light source. It achieves a more focused light and with the use of reflectors, the light beam can be controlled. Chrome reflectors surrounding the diode can be replaced and set at different angles to make the light beam narrower or wider. Due to the narrow beam and with the use of reflectors that are usually clear, COB downlights generate crisper and cleaner as there is no frosting on the lenses. which cuts down the clarity of the LED light. Due to the clear lenses, more light can penetrate further which means they perform well in rooms with high ceilings.

LEDs have been a very good option for indoor growers. With advancement in LEDs like SMD technology and COB technology, it has just added to its advantages. Both SMD downlights and COB downlights are very good options to go for and both have their own unique advantages and disadvantages. Hence before choosing the lights its important to ascertain the requirement.

Why are COB LEDs so important when running on battery power?

When designing a battery-powered lighting system, there has always been a trade-off between the amount of high-quality lumen output (i.e. brightness) and length of runtime via battery operation. Historically, the more high-quality brightness desired, the shorter the runtime (assuming you are using the same size battery).

However, with the recent development of COB LED technology, this tradeoff has become much less of an issue. For the first time, very low wattage COB LEDs can output extremely high-quality, ultra-bright light. As a result, a relatively small and lightweight lithium-ion battery pack can power a COB LED based light system for very long periods of time.

In fact, our 6W COB LED Trade Show Light will run 14-15 hours using our very small and light weight (1.25lbs) rechargeable Mobile Power Center. High quality light output over extended periods of time using a relatively small battery was simply not possible just a few short years ago!

This is why COB based LED lights were the only real choice we had when designing our ultra-bright, ultra-efficient light systems. As such, Silicon Lightworks exclusively uses COB LED technology in its full line of trade show exhibit lighting.

In summary, chip-on-board LEDs are the latest and most advanced technology on the market today. Simply put, COB LEDs are brighter, consume less power, and output a higher quality beam of light compared to older LED technologies found in most other trade show lighting today. The next time you are in the market for exhibit lighting, insist on COB LED technology!


COB LED downlight has a variety of benefits associated with them. These include:
1. Energy Consumption : LEDs use very little energy compared to other bulb types.
2. No Mercury : Increasingly popular compact fluorescent bulbs actually contain a small amount of mercury. This is a highly poisonous substance which is dangerous to both humans and the environment. LEDs do not contain this material.
3. More Room : One of the biggest advantages to using an LED downlight is that it removes the need for more intrusive illumination. Because an LED downlight normally sits inside a ceiling, there is no need for a lamp or a stand.
4. Safer : Because LEDs produce less heat, they are less likely to affect materials which surround them. This is especially important as a downlight because the light and its fitting are surrounded by plaster, insulation, and other combustible materials found in ceilings.
5. Longer Lasting : LEDs last much long than incandescent and fluorescent alternatives. This means less time opening up ceiling fittings and having to replace them.


Despite the above advantages, COB LED downlights still have some negatives attached to them which consumers should be aware of. These Include:
1. Lower Light Levels : LEDs often produce lower amounts of light than incandescent and fluorescent sources. This is because the semiconductor material actually traps some of the light inside due to being a solid substance.
2. Short Term Cost : While LEDs will reduce energy bills, they do cost substantially more than other bulb types.
3. Variable Performance : Due to the manufacturing process, LEDs can vary in the amount of light they produce. This is especially true for older bulbs.
4. Poor Light Diffusion : Because downlights are set within a ceiling housing, the light does not spread out in the same way as an ordinary bulb. It cannot escape out of the sides. This means that more lights are required to illuminate one room as opposed to just a single fluorescent or incandescent bulb hanging from the ceiling.


1. Spot Lights : LED downlights are a great energy saving option for those who want to draw attention to an object or specific area of a room. This is great for highlighting that piece of art on the wall you love, or for creating ambient downlights on a book case, for example.

2. Kitchen Lights : When designing a kitchen, it is well worth considering installing some LED downlights. They can be placed above cooking areas which makes reading recipes and preparing food much easier.

3. Study Areas : Downlights are brilliant for areas where any paperwork or reading will be done.

4. Workshop : A garage or workshop is a perfect place to install downlights as they provide excellent overhead illumination for any project.

5. Atmospheric lighting : LED downlights often work best when used in conjunction with a dimmer switch.

They can create a relaxing atmosphere when used correctly.

COB LED Downlight can be used in a variety of ways and look fantastic when installed correctly. Whether an LED downlight is right for a specific situation or not will be decided by the context, but hopefully the above will assist home and property owners in making the right decision.

Rodec Light’s LED downlights are durable and come with insulated and gas-tight housings. In addition to an attractive design for your market, we make our downlights adjustable to fit the mood of the room. We install advanced controls to turn individual lights or groups on or off for easy consumer access. Our LED down-lights are also compatible with junction boxes to prevent fires while making our downlights easier to install.

Also, Rodec Light has many series of downlight. LED COB downlight and LED SMD downlight. The power range is from 5W up to 50W. The sizes are 2.5 inch LED downlight, 3 inch LED downlight, 4 inch LED downlight, 5 inch LED downlight, 6 inch LED downlight and 7 inch LED downlight. The shapes include round downlight, sqaure downlight and trimless downlight, etc.

Contact the Rodec Light support team and get a quick quote.

A COB light is a type of LED light, with COB standing for Chip-On-Board. COB lights are essentially an array of LED chips that are tightly packed together and bonded to a substrate such as silicon carbide. In effect this creates one large LED chip that has excellent uniformity of brightness, thus making it ideal for photographers and filmmakers.
Chip-on-Board or “COB” refers to the mounting of a bare LED chip in direct contact with a substrate (such as silicon carbide or sapphire) to produce LED arrays. COB LEDs have a number of advantages over older LED technologies, such as Surface Mounted Device (“SMD”) LEDs or Dual In-line Package (“DIP”) LEDs. Most notably, COB technology allows for a much higher packing density of the LED array, or what light engineers refer to as improved “lumen density”. For example, using COB LED technology on a 10mm x 10mm square array results in 38 times more LEDs compared to DIP LED technology and 8.5 times more LEDs compared to SMD LED technology (see diagram below). This results in higher intensity and greater uniformity of light. Alternatively, using COB LED technology can greatly reduce the footprint and energy consumption of the LED array while keeping light output constant. For example, a 500 lumen COB LED array can be many times smaller and consume substantially less energy than a 500 lumen SMD or DIP LED Array.
COB LED Downlight is becoming increasingly popular and for some good reasons, like huge savings on electricity costs,Different colour temperatures for options and Over 35000 hours lifetime. They are welcomed as spot lights, study/work lights and general lights for home or commerical lighting, to replace incandescent bulbs and fluorescent light sources.
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