that 250watter is gunna finish those ladys nicely, to hold those girls grab some bamboo sticks they work wonders, i think you'll get a shock how big a grow diff is with a HPS, I dont recon they are too bad on the electricity bill either, I have a meter on my room so I know exactly the cost of the power i use,my last grow running 2x 600watt HPS 2x can fans, 2x water heaters,2xpumps and 1 oscillating fan for the 1/4 = 3months cost a bit over $190, so gotta be happy with that.Mate I suggest you have your little fan on the box running, blows that hot stale air around,they are doing really great,I bet its turns out to be a filthy smoke:hubba: