-FFT -
MOL 6.9/16" (
MOL= Maximum Overall Length); 1Kw
Clear Quartz lamp
-FCM -
MOL 4.11/16"; 1Kw
Clear Quartz lamp; 400 hours in lamp life - high output in lumens.
-FCL -
MOL 4.11/16"; 500w
Clear Quartz lamp; 2,000 hours in lamp life (loss in lumens) - long life
-FDF -
MOL 4.11/16"; 500w
Clear Quartz lamp; 400 hours in lamp life (high output) - exchanging high output in lumens for lamp life.
For starters, I would give a good service
call in wiring and especially lamp sockets to the
RSC based fixtures.
RSC lamp sockets have huge problems with arching which can be fixed or replaced. But it’s a frequent problem that needs work on and attention to with each lamp change or yearly service
call.
Next as noted above, you have a bunch of different needs or lamps in question.
The Sky
Cyc needs it’s specific lamp for lamp and is not convertible to the others. GE once had the FFT/HIR lamp #20884, it was 650watt and exactually the same in spec as the normal FFT, except slightly higher in
color temperature. Don’t know if still available, but that’s the lamp I would shoot for in saving energy +
dimmer loading and getting a better
color temperature.
Otherwise in being a
filament dirct to focus lamp, I normally recommend going with a frosted lamp instead of a
clear lamp in such fixtures. In this case there is not a frosted lamp for the sky
cyc. Go for the lower wattage HIR lamp if possible and buy a lot of them, because if not discontinued, they probably will be soon. Doubt there will be a
LED option for this lamp type ever. Too odd a lamp
MOL length given
LED fixtures are a direct replacement for it now.
Next set of fixtures is the 4.11/16"
MOL lamped fixtures, which are also all open faced I believe - where the lamp is not masked behind a housing. Again, I prefer a frosted lamp for all of these situations. Frosted lamp just washes out it’s light better in its purpose.
FCM verses FDF in FCM at 400 lamp hours are high output, verses FDF in long life. FDF high output verses FCL in similar specifications for 1Kw - Long life verses high output. 500w verses 1Kw. I would think a theater don’t need 1Kw and would want long life. FDN frosted is high output, FCZ are long life in the 500w long life range.
I prefer frosted lamps and for a theater with a budget, long life lamps specified. FCZ is a great 500w frosted long life lamp. On the other
hand FCM/HIR GE #13895 has almost as much output as the 1Kw FCM, but much less wattage. This if still on the market.
Again, key
role in such
RSC based fitures is going to be maintaining them. Once the lamp
socket gets arched, unless re-surfaced, your perfectly good lamp installed into it will last by my figure 100 hours less than the last lamp installed or removed with a bad
base. And the time clock runs down until the
fixture stopps working or it just gets too many changes on the same
fixture, or too many lamp changes in being dim - the same
fixture again... And again, perhaps someone might figure it out. (I digress as per a bad lamp inspector by profession.)
RSC fixtures have a history of commonly going bad so watch the lamps and sockets to the lamps as you remove them. If showing any arching or heat discolor aging damage, perhaps replace it. In addition to arching, springs weaking on such a
base is common.
