hey Ugwad thanks for visiting! that's good to know about the temps, thanks! I can pretty easily reduce the size it my vent to increase temps, ill give it a go when I'm at the grow again
I was thinking you would increase the temps with more CFL's. Still, I think it could be warmer in there.
I didn't realize it's a 28W LED set up. I have to agree with Goldengoose there's no way it's equivalent to 250W of anything. Watts are essentially watts. If you want an equivalent of a 250W HPS, you'll need something around 250W of LED or CFL or what ever. And you also have essentially the same heat issues.
But for your tiny set up, 250W of anything is probably too strong and too hot. But you definitely need to keep the CFL's you currently have. Because if you replace 48W of CFL with 28W of LED's your light situation is going to be worse, not better.
Are you getting 1 or 2 of the 28W LED's? Hopefully you got two, then you'll have 104W altogether and if you can manage the heat, I think things would grow well. Good luck!