Growing in a shed!

So I am going to be growing 2 plants in a shed in my backyard. So I need some help finding a light that will accomodate my plants needs. Now the triky part about this is there is a sunroom in the shed. its not too big but does let a decent amount of light in. And it does not open.

So MY real question is what kinda light will be right for me.

Additional info:

The shed is not insulated but holds heat very well.
The plants started outdoor but due to an emergency they need to be relocated and there is no other possible way to finish them outside. They are about over a month old.

The transfer is happening within the next few days so I rally would appreciate any help. Thanks so much.

With 2 plants a 400 hps should work good or you could use T5's.
Are they in planters now?
When you go to put them in flower you'll need to cover the windows so you can switch to 12/12 cycle.

They are both in a rormal plant pot. And do you recomend any site that has good prices.

I was just wondering if a 400 watt hps might be too much? It gets like 100 in the summer everyday here which means its a little hotter in the grow shed. And is there something that I can be able to get thats less than $200. Preferably like $100. Thanks