reviews on T5 florescents lights

hey guys, im currently veg ging with 2 2' high output T5 that run at 24 watts a piece, 6400k. i have em in an enclosed 2' x 2' x 2.5' negative pressure box. ive made reflectors for the fixtures and the walls, ceiling and hydro tray is covered in mylar.
im wondering what others have to say about these lights

just wandering,how many lumens are your 24watters?

i belive 2100 high 2000 median

these guys claim they rival hids
homeharvest.com/highoutputfluorescentsnewwave.htm