I bought this COB Led in replacement of a defective device. I like it because the light is very bright. Unfortunately, despite on having all the necessary precautions (extralarge heathsink, thermal paste, etc) the life is for only qround a year of not so intense use (one hour per day). Even so, the price is very affordable and compensates the work of replacement.
Online store: AliExpress
US $1.46 37% OFF|LED COB Lamp Chip LED Lens Reflector 220V 240V 230V 20W 30W 50W Smart IC DIY For LED Flood Light Need Heatsink for Cooling-in Light Beads from Lights & Lighting on Aliexpress.com | Alibaba Group
1.44 USD