General heat vs light question

I have been thinking about an overall general question about heat vs light. Currently i have a 150w hps flowering 5 ppp plants. Currently the temp. in the room sits around 78. I have the ability to add about 200w of cfls that i used to veg with. But the temp in the room rises to about 86-88 degrees. I have co2 supplementation in the room. The question then becomes in the opinoins of experienced growers, which will produce the most yield, 150w hps ONLY with 78 degree temps, or 150w hps with 200w of additional cfls but will a temp of 85-90 (with co2 supplementation).

Thanks for your opinions

i would go with the temp thats high with co2 that would improve your yield but is it co2 also on with the 78 room

The co2 can be on with either temp, if the yield will be higher with co2 at 78 degrees then let me know. and again thanks for all the help