Is this okay to veg and flower with?

[h=1]Sun System 150 watt HPS System[/h]

• 150 watt high pressure sodium bulb included - delivers an amazing 16,000 lumens! The color spectrum is ideal for indoor growing.
• Highly reflective aluminum insert.
• Vented housing helps dissipate heat.
• Durable white powder coated finish.
• Backlit on/off switch.
• 7' grounded 120 volt power cord.
• 2-Year Warranty.

Sure, don't get too ambitious trying to pack too many plants under its effective area, but you could grow 1 or 2 for sure.

As long as you have a fan or 2 running to ensure you dont toast your plants i cant see why not. You wont get a HUGE harvest under that wattage, but its better than nothing.

If your new to growing i will suggest you do a LOT of reading up before jumping into a grow though. as all first time growers will run into some sort of barrer at some stage .

also on the topic of light distance have a good look at this picture for an idea of the safe distance from plant top to lighting.

I used a 150w HPS SunSystems in a 2x2x5 tent. Although I didn't flower under it, I was able to grow two plants in veg without problems. It gets kind of hot though. By blowing air into the bottom and letting it go out the top I was able to keep the temps at plant level in the high 70's. Don't forget oscillating fans though. I wouldn't try to flower more than one plant and I'd bend it all to hell to keep your canopy level. I'd trim your branches bare except for the top plume of leaves going into flower. Good luck!