ZeldaG. Do you live in USA? If so, i bought two 4 foot flouro shop lights (the kind that hang) for like $8.00 a piece from Wal-Mart. Then i got 4 GE ecolux daylight bulbs to go with them, each bulb puts out 3050 lumens. I dont rememebr exactly how much the bulbs cost but i know its less than $10 a pair. Also, wal-mart sells the CFL bulbs (compact flourescent) Get some that are 150w equvilent. They also sell those shop lamp fixtures with the shiny reflector dome.. like $5 bux a piece. Also in the sporting goods section, they sell theses things called emergency/thermal blankets, line the inside of your box with that. Make sure you get cool white bulbs for vegging and warm white for flowering. GE sells ecolux kitchen and bath bulbs that are 3500 lumens each (i think).