30 Watt, 8 inch "Cool White" Circular Lamp Source

[Brad]

Hi,

I have circular lamps in my shop that uses 30W 8 inch circular
fluorescent "Cool White". One lamp failed and I couldn't find a source
(Home Depot, Lowes, 3 electrical products distributors, including
the company that made these fixtures) to get a replacement.
Lowes carries 30W 8 inch, but only in "Warm White" (UGH).
I installed a 22W because I wasn't sure a 32W would be ok for the
ballast. I called Philips and another lamp mfg. They don't have
30W 8 inch "Cool White" or "Daylight"!!!

Thanks in advance, Brad

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[Michael Ware]

Try this site, they seem to have quite a selection. I wouldn't be too
concerned with the wattage (30W old vs 22W new) I think they are just making
them 'energy-saving' now.

http://www.atlantalightbulbs.com/ecart/pg0827/13580.htm

 

[Fred McKenzie]

Try this site, they seem to have quite a selection. I wouldn't be too
concerned with the wattage (30W old vs 22W new) I think they are just making
them 'energy-saving' now.

Brad & Michael-

Doesn't the ballast determine the Wattage? If so, the 22 Watt lamps may
be bright enough, but not last as long as the 30 Watt lamps.

I don't recall ever seeing a 30 Watt 8 inch circular lamp. What company
made the fixture? Perhaps they have a retro-fit kit that would adapt the
fixture to use the more commonly available lamps?

Fred

 

[Michael Ware]

Brad & Michael-

Doesn't the ballast determine the Wattage? If so, the 22 Watt lamps may
be bright enough, but not last as long as the 30 Watt lamps.

Perhaps. but I have seen preheat type ballasts labeled 15W-18W-20W, so I
don't think it is that critical.

I don't recall ever seeing a 30 Watt 8 inch circular lamp. What company
made the fixture? Perhaps they have a retro-fit kit that would adapt the
fixture to use the more commonly available lamps?

If it were me I would replace the whole fixture. If he absolutely loves the
circular tube lamps, he could replace the ballast with a rapid start
electronic ballast. That would promote longer bulb life, and probably
provide more light output.

 

[James Sweet]

Perhaps. but I have seen preheat type ballasts labeled 15W-18W-20W, so I
don't think it is that critical.

Those run all the lamps at around 15W, it's not critical, but you do
want to stay within a reasonable percentage of the nominal wattage
printed on the lamp. Many inexpensive "40W" fluorescent ballasts
actually run the lamp at closer to 25W which is why they're so dim
compared to a good ballast.