1、New projection light source, light source and constant current drive are integrated. 2、No need drive&welding - directly use AC voltage. 3、Simple&convenient - only need plug in the cable, time-saving&money-saving. 4、Wide applications - can be used as replacement chip for projection lights, spotlights, mining lights, street lights. 5、Long lifespan - made of superior material, guarantee long service time. Features: New projection light source, light source and constant current drive are integrated. Wide applications - can be used as replacement chip for projection lights, spotlights, mining lights, street lights. Long lifespan - made of superior material, guarantee long service time. Specifications: Type: COB light bead/light source chip Chip Brand: Derundahao Color rendering index: 70 Luminous flux: 100-110(lm)/W Power: 20/30/50(W) Wire Material: no Substrate Material: Superconducting Aluminum Illumination angle: 120 ° Luminous efficiency: 90 (lm/W) Thermal resistance: ≤ 5 (°/W) Correlated color temperature: White light (AC100-260V 20W&AC100-260V 30W&AC100-260V 50W) Light surface size: Approx 25*25(mm)/1*1inch Dimensions: Approx 54*54*1.5(mm)/2.1*2.1*0.1inch Weight: Approx 17g/0.6oz Size: Approx 5.3*5.3*0.6cm/2.1*2.1*0.2inch Package list: 1 * COB Light Source Chip Note: Please remember to pay attention to heat dissipation! Equipped with sufficient wattage, please match it with sufficient wattage thick shell! Every 10W needs 500g lamps. Need to coat thermal conductive silicone grease closely to the heat sink before installation!