Review on CHANZON 10 Pcs High Power Led Chip 4W RGBW 8 Pins (300MA - 350MA For Each Color 4 Watt) Multicolor Super Bright Intensity SMD COB Light Emitter Components Diode 4 W Bulb Lamp Beads DIY Lighting by Rudolph Mceachern

Good product, super bright. If you plan to run them near full power they will need a heat sink. Just playing with one of them some of the magic blue smoke started coming out when I adjusted a potentiometer to approach full power. Quickly disconnected it and it actually still worked after it cooled down. I considered rating at 4 stars since there is no heat sink included but that didn't seem appropriate, although it would be nice if there was a package offered that did include them.I would purchase more if I needed them.