yeah it is 780 lumens, i have one of these in my box but it mainly is there to add heat to my box. it doesnt have a good lumen to watt ratio and the special spectrum it is really doesnt help that much. CFL compact florescent lights are better bet since the 100w replacements are 23 actual wats and produce 1300 lumens. you can get 3 y splitters and then have 2 more comming of and have 4 sockets and plug in 4 23w bulbs and get over 5k lumens. which is reccomended for one plant