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Yup. Got mine running 4 T5 46.5 inch bulbs (This is the max you can run on the 660). The 660 is overdriving them from 54 watts to 90 watts. Makes them a lot brighter. Had to run a WorkHorse on the lights for a while and could tell the difference in light intensity right away.
 

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Supposed to last for 2 years, that was one of the main reasons I switched over to T-5's. Mines been up and running since January with considerable growth on my SPS's when compared to the 110W VHO's I replaced.

I will probably change them at 18 months. The 6.5K GE Starcoat F54W/865 HO bulbs only cost $7.49 each. Biggest expense will be the T-5 blue bulb that I use to even out the yellow color, about $25.
 

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I had my local lighting store in Lansing order them for me. Make sure they are getting the GE Starcoat F54W/865 HO bulbs if you have a 48" canopy.

tszetela was selling some recently for $8/bulb.

Yes, you need the individual reflectors to get the most from these lights.
 
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