Hi recently I thought of switching to COB LEDs from traditional bulbs.So I looked up for some LEDs in AliExpress(only way of getting these in my country). Got some with 90% efficiency according to the charts(as 2700 lumen in 30 watt)Now I have to pack it with some heatsink. Using this- http://bit.ly/2AdA2lv calculator, I found that I might need 112 cm3 heatsink.The problem is http://bit.ly/2SgXhCd the first heatsink in the image has a 150 cm3 dimension & the second one has a 60 cm3 dimension. But the second one has more metal than the first one.So which will be sufficient for cooling the led?Thanks all. via /r/DIY http://bit.ly/2RcjBj5
