people grow great weed with CFLs which are more cost effiecient. COBs are DIY projects that are beyond the ability of many.new enhanced spectrum HPS bulbs are available that will outperform standard HPS bulbs and LEC outperform HPS.i'm not saying LEDs will not grow plants. people have grown plants with every form of electric light.I have tried DIY COBs and was not impressed with quality or yield.
