You have a 400HPS already? The other stuff isn't going to do much except generate heat and suck up power. If you're looking to add more light, without destroying your finances with an HPS or MH, try this:

I took a few of those 24" cool florourscent lights, and mounted them on the walls sideways in my grow room (attached). They'll make a pretty good dent as far as lights go, and I like them because they get into the lower regions that the HPS doesn't get down to because of shadows and leaf penetration.
darpin Reviewed by darpin on . gro lights? I got high and went to Lowes looking at plants and things, anyways I found a 120w Spot Grolight, they were $6. I got two of them and two floodlight socket, they were $3... so for $18 I got 2 120 watt grow lights. Has anyone used these with success?? Because I was going to try them for my mothers and veg and just get about 5 or so... I mean $45 for 600 watts isn't too bad. Just wondering if anyone knows if it should work or am I getting my hopes up? Rating: 5