I used a homedepot $10 T8, Had this a couple of years and use it to start my peppers & tomatoes, and it works pretty good for this. Im going to add 12 leds to this in a config to light an 18x18 exo and 2 15g verts, on my rack. Supplies 48" T8 homedepot 7 XPG 6.5k leds Cutter...