Need some advice

Ok so I have a 5 week sharksbreath plant and a 5 week Rocklock plant growing under a 1000 watt hps system. I started them as seeds under compact fluorescents and moved them to the sodium light when I got it 2 weeks ago. They and nearly 2 feet each and look terrific. Due maybe to over ambition i've added 3 G13 Kush plants to the mix and they're a week old. Im gonna be moving the 2 big girls to flower in my flowering room but having the G13 plants in vegetative growth I wanna keep them under the hps light and flower Sharksbreath and Rocklock under the compact fluorescents. What if any might be negative effects from changing the light so close to flowering???
(The compacts I use are 150 watts and each plant has 3 for a total of 7800 lumens per plant which is pretty close to ideal)

Also I had burned the Sharkbreath plant with the compact bulb early on and I feel like it has a tendency to burn more easily than the other plants> Has anyone ever heard of a plant being badly burned and recovering only to be more prone to heat stress???

So your plan is to flower under the 150 and veg under 1000w? that really doesn't make any sense to me. CFLs are capable of flowering plants well, but not giant plants. If you get a moderate stretch on a 2 foot tall plant you are going to have a hard time getting good light penetration.

The CFLs apparently worked really well for you, why not just veg with them and keep the plants in line?

I've never had a heat stressed plant become more prone to it. Perhaps in the spot where it was healing itself, but not elsewhere.

had a friend that partially burned one of the top colas of a plant midway through flowering. that cola grew twice as big as the other buds. im guessing because it wasnt completly fried. just leave it and see what happens. and i think thalboy is right about flowering under the cfls. you will produce a much larger yield under your 1000hps. also you want to make sure if you are vegging under cfls that they are in the 6500k spectrum, not the 2700k soft whites. changing the lights close to flowering is fine, as people do it all the time from t5's, to mh's, to hps. good luck with the grow!