On 5/4/2010 8:15 PM, kd4e wrote:
> Two questions about Metal Halide lights:
>
> There are commercial-grade fixtures above each of the
> two doors that use the Philips M-90 bulb and also have
> light-sensors mounted on top.
>
>
I'm not even familiar with them, but I have 22 8' long, 75 Watt,
fluorescent tubes suspended from the shop ceiling. Now there is little
difference in the price of self igniting fluorescents, and the ones that
use the ballast in the fixture, BUT when a ballast needs replacing it's
cheaper to purchase a whole new fixture than just the ballast, unless
you buy them a 100 at a time. It only looks cheaper until you take a
look at the operating and maintenance costs. I don't know, but I'd bet
it's that way with these new lamps as well, or soon will be.
73
Roger (K8RI)
> On Topic
>
> 1. Are they a known source of RFI?
>
> Off Topic
>
> 2. Do the bulbs come in yellow? (I haven't found any
> and may have to replace the fixtures or convert
> the fixtures, so I may use a yellow bulb as the
> bugs are attacking the house in the thousands at
> night making use of the doors an adventure -- plus
> they are finding their way in around the window A/C!
>
> OR is there a yellow film or spray I could apply
> to the lens?
>
>
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