Hello,

I think that your lights will do O.K. As you have already stated, an HPS would be better. So once you can afford to upgrade, I would. Putting some of your fluoro's on the sides of the plants is a good idea. This will help with light penetration and side bud development.

I agree with what has been said about the ventilation.

A trick to indoor growing is trying to come as close as possible to copying mother nature. The advantage is that this can be done in an even more controlled environment, therefore resulting in better quality/quantity.

Good luck on your grow.

Here is to home grown dreams, burning on resin coated screens.

Peace