[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: T-8's and Needle Valves

Erik, help me out here because some of these designations I can't find
anywhere in Sylvania or Phillips lamp catalogs or in Grainger's Lighting

> diameter of the bulb, i.e. 8/8 of an inch or 1" diameter.  The OLD kind
> of T-8 has been around forever, and works just like the normal old T-12,
> but the NEW kind requires the special ballast and is super-efficient.

Huh? How available is this "old" kind these days? I'm aware that some T8s
are more energy-efficient than others (with labels such as "Super Saver")
but as far as I can tell, it's not a matter of age or obsolescence. T12s
also differ in their efficacy.

>   1. Bulb's marking code: The new style T-8's have codes like "FO32-T8"
> (4' model) and "FO17-T8" (2' model), while the old bulbs will just be
> "F30-T8" (similar to "F40-T12") or "F15-T8".   -> No "O" in the
> designation.

I cannot find an F0 designation in any of the catalogs mentioned.

>   2. Wattage: Old-style bulbs come in 15 watts for 18" tubes, and 30
> watts for 36" tubes.  These are the two common sizes (24" bulbs at 18-20
> watts(?), and 48" bulbs at 40 watts come in T-12 sizes usually).
> New-style T-8's are 17 watts for 24" and 32 watts for 48".  I haven't
> seen a new-style T-8 in 18" or 36" yet, so I don't know if they exist.

I have four GE SPX30s that are 36" T8 lamps using 25 watts. It would be a
"new" T8 according to your wattage criterion but it is labeled F25, not
F0-25. Check Grainger's Lighting Catalog, page 59. None of the "new" T8s in
the catalog has an "FO" designation.

Greg. Tong
gtong at sirius_com

"Often, the things that change are less interesting than those that stay
the same."--Aaron Fleisher