Rate my set up or use my idea works well for me

I bought a 15 $ two shelf thing at Walmart and converted it into a grow station/box as far as lights I'm running 5 2700k 1600 lumen each CFls on top and the sides have a 1600 lumen 6500k cfl and a 3000 lumen 2700k cfl ( I'm flowering early to see what happens day 4 now) all totaling to 17000 lumens it has two computer fans on the sides at the top blowing in air to move hot air out the huge top fan I also have a circulating fan in the room giving it a slight breeze every 6-8 seconds. The temp stays at a steady 74-76 when lights on and at night 69-71 degrees the hopefully female plant is from a bag of some really good stuff not sure of the strain and the three new cups are just about to break surface they are granddaddy purple. Let me know what I can do to improve or doing wrong or just better ideas to make the box more effecient

Only problem I see is a height issue your going to have a hard ass time trying to tie everything down once they start exploding on you

Yea what Cheeba said, and temps will surely rise once the plant has taken over the box, but I've certainly seen a lot worse micro grows.

Maybe your two intakes should be at the bottom of the box, and have two more pc fans at the top for extracting the hot air?

Fair play for getting a grow up and running on a budget, I hope it works out for you