Quote:
Originally Posted by GregWeld
A 28W T5 produces about the same light output as a 32W T8 and a 54W T5HO produces close to twice the light output of T8 and T12 lamps when these lamps are operated as part of a ballasted lighting system. The nominal light output of a four-foot 54W T5HO lamp is 5,000 lumens, compared to 2,900 lumens for a 28W T5 lamp and 2,850 lumens for a 32W T8.
As a result of the same or greater light being produced from a smaller area, T5 lamps appear brighter and of course so do T5HO lamps. T5HO lamps are not recommended for fixtures where the light source is directly visible. They are too bright. However, this characteristic makes them ideal for compact indirect fixtures.
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Greg must have big supply of T12 lighting, because it is being phased out.
My T5HO lamps produce 54W, the recommended fixture is Zumtobel is made in Austria. Total Lamp Lumens is 8800. This fixture has a diffuser, so it is not direct lighting. Hard to find this fixture in the USA, but Vault sells them. I love mine. Cost a bit more, but it was worth it. I had these installed in 2009.
If you go infrared radiant tube heater, then this type fixture will be more flexible in the design.
You can read their light study in their brochure.
http://www.vaultgarage.com/_pdf/Vault-Lighting-2010.pdf
http://www.zumtobel.us/PDB/teaser/EN...20Brochure.pdf
T8 phase out is more confusing....Depends on the series, but I go T5-HO.
http://assets.sylvania.com/assets/Do...4bce0bcbeb.pdf