Hmmm. Thanks nikk.
Dont get me wrong either, I love what I have been doing with CFL's too. Although, once I started reaching 300- 400 watt usage in CFL's (including veg box) I quickly realized CFL is not always more energy efficient. When I'm running 300 watts of CFL's flowering, it's hard to not justify buying a 150, or 250 watt HPS, since it would be more energy efficient and the same if not better results.

Although I've heard the knock on HPS is it has the least amount of UVB being emited. Has anyone here tried supporting a 150 or 250 watt HPS with several UVB bulbs. I wonder what kind of results this would produce? Also how important is Co2 for HPS? I know I live beside a busy-ass street, I would think lots of Co2 is coming right into my open window?

Don't confuse Co2 with Carbon Monoxide.

the proof is in the grow, lol. You can get a 150W HPS security light for less than $90, and probably get one cheaper on ebay or from an industrial supply company that sells them as "low bay lighting." seriously, almost 16,000 lumens for 150 watts of energy used is pretty awesome.

hey if you have the space,safety,and ventilation for the heat,why not get an hps along with your set up now??

oh and yeah i know a few folks on here that suppliment they're hps and cfl set ups with 2 or 3 26 watt reptile uvb bulbs

Well it sounds like the pollution coming in my window wont help my plants, but I'm set on buying a 150 watt hps eventually.
CFL's are cheap but, so is a 150 HPS it seems. They wanted $230 canadian for the kit at my local hydro store !! I dont know if this was some "high output" bulb or something. But if there is no major performance difference sounds like I should just get an industrial one.

Anyone know where I can get a 150 watt HPS cheap, in Canada?

why dont you just use the net,order em online and have them delivered..i seen an 150 watter for 90 bucks i think the website was cheap grow lights.com maybe