COB refers to chip on board technology, which means the LED chip is mounted directly on the FPCB. Chip on board led strip can strengthen heat dissipation and improve LED glare effect. So the COB led strip has the characteristics of high density and soft uniform light.
COB LED light strip can be made into any color (2700K warm white, 3000K soft white, 4000K natural white, 6000K daylight, red, green, blue, yellow, purple, pink, CCT adjustable color temperature, color changing RGB, RGBW, RGBCCT, and dream color addressable RGB).
Are COB LEDs Better Than SMD LED Strip Lights?
1) 180 degree large luminous angle. 2) More flexible, bend at will (can be twisted and wound). 3) High CRI up to 95+. 4) Good thermal management. 5) Spotless/dotless/constinuous/linear light effect, even light. 6) High luminous efficiency. 7) High density up to 840LEDs/m. 8) Lower power. 9) Longer lifespan.
COB Flexible led strip light specification 
What you need to know about led strip installation:
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