10pcs/lot Sumbulbs DC9-11V 3W Round Chip On Board COB LED Light Source 28mm Diameter for Spotlight Downlight DIY Lamp Bulbs | Лампы и

10pcs/lot Sumbulbs DC9-11V 3W Round Chip On Board COB LED Light Source 28mm Diameter for Spotlight Downlight DIY Lamp Bulbs | Лампы и

10pcs/lot Sumbulbs DC9-11V 3W Round COB LED Chip On Board Light Source 28mm Diameter for Spotlight Downlight DIY LED Lamp Bulbs

Features:

• 3W 2820 round COB LED Chips
• Diameter: 28mm
• Lingting diameter: 20mm
• Power: 3W
• Rated current: 300mA
• Workinf Voltage : DC 9-11V
• Lignt temperature: 2700K-6500K
• Lingting colors: Warm white (3000K), Nature white (4000K), Cool white (6500K)
• Luminous efficacy: more than 100LM/W
• Application: Spotlights, Downlights, LED bulbs, other LED Lighting

​Package Included:

• 10pcs 3W 2820 Round COB Chips

10pcs/lot 28

For other LED COB Strip, please click the below picture for more details:

What is COB?

COB (Chips on Board) is a new technology of LED packaging of LED light engine. Multi LED chips are packaged together as one light module. When it lights up, it looks like a lighting panel.

How COB LED light source works?

In COB lighting, single LED chips are placed directly on a circuit board (or substrate) which has thermal properties to disperse heat. Heat dissipation is a very important aspect of LED lighting since it can have a major impact on the life expectancy of the luminary. Therefore, COB lighting can have a higher LED chip density and achieve higher light level while maintaining or improving life expectancy.

Advantage of COB:

COB lights are a more efficient form of LED lighting for general or automotive lighting applications because:

- light has a more uniform appearance

- better life expectancy

- achieve higher light level over a large area

- COB is more stable and reliable than standard LED package

Applications:

Shenzhen Sumbulbs Environment Technology Co., Ltd., is a professional Manufacturer & Servicer for LED Lighting who has around 10-year experience in China.

Sumbubls Company has a complete & scientific Quality Management system, with a number of very experienced engineers and technicians, and is equipped with full of advanced high-tech equipment and production lines.

Sumbulbs mainly focused on the research & development of LED Lighting resource, the designing and producing of LED lights. Products range from COB chip, Ceiling Lights, Spotlights, Crystal Lamp, Tube Lights, Track Lamp, Street Lights, Miner Lamp, Project Lamp, Sunlight Lamp, to Flash Lights etc. Our products are widely used in hotel lighting, room lighting, office lighting, ourdoor lighting and industrial lighting and other lighting projects.

Our products are widely sold to abroad and domestic markets, and got very good high evaluations from our customers.

“Quality First” is always the driving power for Sumbulbs People.

Sumbubls, is on the road to be the next excellent GIANT in Environment Lighting.

10pcs/lot Sumbulbs DC9-11V 3W Round COB LED Chip On Board Light Source 28mm Diameter for Spotlight Downlight DIY LED Lamp Bulbs

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1. If the goods is DEFECT/ BROKEN when you receive it or you are not satisfied with it, please return it within 14 days for a replacement or refund. But the goods must be back in factory condition. Please contact us in advance and double check the return address before you return it.

2. If item is defective in 3 months, we could send you a new replacement for free or offer full refund after we receive the defective item.

3. If item is defective in 12 months, we could also offer you replacement service, but you have to pay for the extra shipping expenses.

Our aim is to provide Top Level Customer Service, and our customer service specialists are always standing by to solve any of your problem. 

10pcs/lot Sumbulbs DC9-11V 3W Round COB LED Chip On Board Light Source 28mm Diameter for Spotlight Downlight DIY LED Lamp Bulbs