Thanks Scotch, I edited following your comment.How Big Of mother, what size space, etc etc etc
Well done Tomate! Any pix of your setup?I recently bought 8 CXA1507 18V (4x 5000K H2 & 4x 6500K H4) and will run them at 210-300mA.
As for the efficiency, they will give me about 150-160 lm/W and 4600-6200 lumens in total @2 sq ft for two of my bonsai moms drawing 32-46W from the wall.
All together, I paid ~$60 for the COBs, holders, a driver and heatsinks.