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Harlan, I
do lighting design work for a fluorescent fixture manufacturer.
There is more than one type of both T12 & T8 lamps. If your friend is
using an F96T12HO lamp, two of them have a system wattage of 216 watts & around
9000 lumens per lamp. F96T12 slimline is actually a 75 watt lamp
with a system wattage of 158 & around 6300 lumens per lamp.
These are both 8’, T12 lamps & my wattage figures are based on
magnetic ballasts (most likely for older fixtures). Incidentally, both of
these lamp types are rated for 12000 hours per lamp. T8
slimline lamps are a 59 watt lamp & have a system wattage for two lamps of
110 watts, are rated at 5950 lumens per lamp, & a 20,000 hour life. The
86 watt T8 HO has a system wattage of 160 watts, 8200 lumens per lamp, &
18,000 hour life. The
4’, 32 watt T8 lamp is rated for 20,000 hour life & you can operate 4
of them on a single ballast at 114 watts & 2950 lumens each. All
of my figures for the T8 lamps are based on solid state, electronic ballasts.
Four of these is a good replacement for two of the 8ft, T8 slimline
lamps. You can get the same light output at about the same energy
cost & you’re buying a less expensive lamp that’s easier to
store & dispose of since it’s only a 4’ lamp. Bottom
line, be sure of what you’re comparing. You could replace T12HO
with T8 slimline fixtures & save about 50% on electricity, but then you’d
only end up with about 2/3 of the light that you started with. Regards, Dean
Vandergriff Applications
Manager H.E. Williams,
Inc. From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of [EMAIL PROTECTED] hi wondering if there are any
electricians out there who know if this is true, a salesman told my friend he
could switch his fluorescent lights from a T12 to a T8 type of light and he
could save $1179.00 a year on his light bill and have more light with the same
ammt of fixtures (13). I priced the fixtures out and they are 24.00 more
per light (twin 8' tube) or 6.00 more per light for a 4-tube- 4'
bulb light. I need about 90 of them for my shop so the cost on the light
fixtures would be a lot more, but if this savings on lighting bills is true
maybe it would be worth it?? (my friend owns a small muffler shop so
the lights are on at least 8 hours a day). they claim the wattage on his
fixtures are 490, and the new fixtures are 166. thanks for the help. Harlan |
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