Sidelighting with Floros, Is It Worth It?

What is the impact of sidelighting? I can't tell if sidelighting with CFLs is having much of an impact on the grow.

The main light is a 600 watt hps grow lux overhead right now. the space is a 2x ~3.5 and lined with white paint.

I have a 40 watt 2 bulb 4 foot shop light lighting from one corner and I have 2 40 watt cfls 5600k and a 1 foot grow light that could also be thrown in the mix. All the floro's are in the blue area of the spectrum.

When I have all the side lights up there is increased heat in the box but it doesn't look any brighter since the HPS is so bright. Is there a chance that I am actually hurting the plants during flowering since I am giving them extra light from the blue spectrum which might be blocking out some of the red from the HPS?

.

Is 2x ~3.5 metric?

.

It helps. When I added some sidelighting (eight 30-watt CFLs), my yields went up about a quarter pound, in a space about 20" x 47", 6' tall, augmenting a 400w light. The difference wasn't all that much visually, but it showed up on the scale, which is what really matters.

i just started flower 4 days ago . over head 400 hps 250 mh . on side of mh i set a 150 hps. on side of 400, 70 hps 6 plants 2 ft deep x 5 ft wide 6 ft high . mtemps 72, 78.just like jam said "noticed it on the scale". thats whats up

Thanks for the advice... How much sidelighting should I provide? As much as I can afford while keeping the temps right?