Lighting 39V 2.1A COBs good/cheapish drivers?

Check the heatsinks that timber uses. They are the same northern grow lights sells at 35 watt but the rep says 50 is suitable
 
Well I don't read Russian lol but I think it's actually sized properly. The colliance i have a few of are 100mmX70mm with a 10mm base. eBay ones are much smaller. They say mine are rated for 50w but I have seen temps up to 144f

I think they rate heatsink for LED WATTAGE instead of HEAT WATTAGE. It's problem here in EU because those sellers don't know what is HEAT WATT. And they cannot help you or didn't have those big heatsinks.
 
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