my mars 300 panel puts out 7900 lumens, and pulls 180 actual watts, not the greatest effiency, my 2 cree cobs only draw 104 watts, but put out an amazing 14,000 lumens, see that guy who replied to your thread , his name is church haze, he is a great guy and is a wizard with DIY led,, hit him up man, these guys showed me, and it was so simple and these cobs grow pot like nothing else can