The kit comes with the lamp, and pump. The replacement bulbs are fairly cheap considering other bulbs. Ive been using one (to test it out) for about 6 mo and the bulb is still well. Oh when I went do to Petsmart, the green killing machine, was in some random spot, I dont think my Petsmart realized it was for an aquarium. I want to say I picked it up at the reptile side.