50W Rectangle LED COB Chips AC Input 220V Built-in Smart Driver IC Driver for DIY Spotlight Projector, Warm White

2 No power needed, connect 220V AC directly, suitable for DIY
3 Must need an aluminum heatsink for cooling.Attention: A. Try using a larger heat sink. If the heatsink is equipped with a fan, the minimum size: 40 * 30 * 1 (CM); If the heatsink has no fan, the minimum size: 50 * 40 * 1 (CM); B. Thermal silica gel should be used between the heat sink and the lamp balls. This is especially important!
4 Material: Aluminum High conductivity, not easy to damage, rapid heat dissipation.
5 Lifespan: 10000 hours. Warranty: 2 years