Well ive done alot of researching and ive decided to go for it. Here is what people have said.

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(OverGrow.com) Got it from google's cach

Le Maillot Vert
Senior Member
Registered: Jul 2003
Posts: 888

"I made the switch from regular hps to son agro in my 400w hps ballast flower chamber.

It does make a difference.

The problem is that unless you find a real deal the son-agro bulbs are way expensive.

I got a 430w son agro from farmtek.com for only 44$.

I don't think I would pay 58$ for a 160w son agro.

If you are going to run dual 150s in your box, then I think a better option would be to buy a 150w metal halide light and use that.

for like 55$ you can buy a 150w security light from e-conolight.com and convert it for grow use.

with the 150hps and 150 mh you will have a nice spectrum of light in your box and you can rotate the plants so that they are getting more balanced light."

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(http://www.hempcultivation.com/420/s...ad.php?t=72739)
sientbob

Grand Master Gardener Join Date: Feb 2003
Location: mason dixon line 36'N
Posts: 3,152 (list)

drwho, 430 sunagro bulbs will work in 400 watt ballasts but will only be able to draw 400 watts, meaning you are not getting all of the advantage out of the bulb.
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So, i guess if it was the other way around where i had a higher powered ballast than the bulb it would cause problems, but because the ballast is less it just wont power the bulb the extra 30w. (I can deal)

-SS