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Energy-Saving Stage Lighting Fixtures

Printed From: Community Theater Green Room
Category: Producing Theater
Forum Name: Lights and Sound
Forum Discription: Technical discussion
URL: http://www.communitytheater.org/forum/forum_posts.asp?TID=4366
Printed Date: 5/24/25 at 10:19pm
Software Version: Web Wiz Forums 8.05 - http://www.webwizforums.com


Topic: Energy-Saving Stage Lighting Fixtures
Posted By: Mr. Lowell
Subject: Energy-Saving Stage Lighting Fixtures
Date Posted: 12/08/09 at 2:11pm
I have some old Altman 14" Scoops with 1000 watt mogul base lamps.  They are power hogs!  Especially since I use them daily as ghost lights and general work lights.  Does anyone know of some alternative lamps for these fixtures that use less juice for the same coverage?  Are there any compact fluorescent or LED lamps that will fit these mogul sockets?
 
Thanks, Dana

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Mr. Lowell,
Lighting/Set Designer & Tech Director,
for the Linda Sloan Theatre,
in the Davison Center for the Arts,
at Greensboro Day School



Replies:
Posted By: gelcat
Date Posted: 12/08/09 at 3:16pm
You might try to find adapters for those- I used to have one for an old floor lamp I owned- come to think of it, I may have left in the lamp when I donated it to a community theatre! 
Anyway, if you have a good electrical supply house that has been around forever, you might have luck there with them being in stock, otherwise, you may have to dig harder.  Basically the adapter screws in to the big socket, and has a medium base screw socket for standard medium base household lamps on the inside.   
 
Actual efficiency of the light in relation to the reflective angles of the scoops??  You'll probably just have to try different lamps. 


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www.actorsguildonline.org
Actors Guild of Parkersburg
Parkersburg, WV


Posted By: Spectrum
Date Posted: 12/09/09 at 1:27pm
One THOUSAND watt scoops for ghost/work lights?!  Forget converting them.  Why not just replace them with a few standard fluorescent work lights or even several CFLs in reflector hoods scattered about your stage?  That would have to be cheaper and more practical for daily (non-performance) use.  ...Unless, of course, you have an enormous stage area.  You can find inexpensive fluorescent fixtures if you look hard enough.  Big Lots, discount tool outlets, occasional sales at Home Depot, etc.  I bought a four foot, dual tube worklight for over my workbench for $10.00 not long ago and it included the tubes!  Good luck.

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Growing old is mandatory. Growing up is optional.


Posted By: Mr. Lowell
Date Posted: 12/09/09 at 2:05pm

Yes, as I sit here, there are eight 1K scoops burning on the stage and in the house.  I could cook pizzas on them!  And they burn all day because of intermittant rehearsals, drama classes, spontaneous tours, and tech work, etc, etc...  There are props to trip over backstage and a pit to fall off of, so for safety, I need lights on at all times.

There is no place in this facility to hang standard fluorescent tube fixtures.  They cannot be hung on the electrics because they would obstruct the use of 200 lekos, etc., and there are no hard points on the interior walls that are safe for tubes due to flies, scenery, sprinklers, etc, etc...  It's a 600 seat traditional proscenium theatre with 25-line, 6-story fly loft.  When it was built, there were ZERO worklight fixtures on stage whatsoever.  The fly lines are dead-hung on the I-beams, so I have no grid to hang fluorescent works in the loft.  The stage floor, including wings, is 100 feet wide by 40 feet deep...with ZERO light switches or works.  So I have to use theatrical instruments hung on my electrics and my ETC dimmer system to operate worklights all day.  It pretty much sucks.

For the first couple years I used those portable carpenters worklights from Home Depot with 500 watt tubular halogen lamps.  It took 14 fixtures to provide minimum worklight on stage and in the house.  But all of those fixtures failed due to carbon scoring and heavy rust on the lamp base terminals...plus the internal wiring melted due to 18 hour use over 2 years...a huge waste of money.
 
Then I went to the LDI convention with the main task of looking for solutions to this.  I found some cool-looking compact fluorescent lamps at the Eiko booth.  They were about a foot tall spiral and have mogul bases.  I got 12 for about $40.00 each as an experiment.  But they all melted and failed within 30 minutes to about two weeks time of use due to overheating in the Altman scoops.  They are base-down-only lamps, and there was no way to light a stage with scoops with the bases down.  I kept the scoops tilted up as high as I could and even drilled ugly vent holes in the tops of the scoops, but all the lamp bases still died from heat....another big waste of money.
 
Ideally, for daily works in the house and for general rehearsals on stage I should really have some low-energy vapor "clean-up lights" like they use in movie theaters, warehouses and gymasiums.  There are also other types of industrial works that use compact fluorescents and new LEDs.  But I have to wait for some of my major "wish list" items to get approved by the higher powers...
 
In the meantime, I am simply looking around for stop-gap ways to retrofit my large stock of "old-school" scoops.  In the longrun, I would love to find a "green" solution to my worklight problems that saves money.
 
Thanks for the input.  -Dana


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Mr. Lowell,
Lighting/Set Designer & Tech Director,
for the Linda Sloan Theatre,
in the Davison Center for the Arts,
at Greensboro Day School


Posted By: David McCall
Date Posted: 12/09/09 at 3:13pm
Have you looked into the fluorescent fixtures used in TV studios. They put out a lot of light in a reasonable size and likely an unreasonable cost.
 
My experiences with fluorescent lights around the house has been unfavorable. I haven't gotten very long life out of them, and I don't like that they contain extremely hazardous materials. I'd rather pay more for electricity. The dimable consumer versions didn't dim well and failed in much less time than tungsten lights on the same circuit.
 
The PAC I work in has a lot of dimable fluorescent lights at the top of the fly. It works pretty well but a lot of light gets lost due to soft goods that live up there. I don't look forward to going up 40' on a lift to replace the burn outs.
 
We mostly use PAR cans for rehearsals and other times that more light is needed, but they aren't cheap to replace or run.
 
I had considered those work lights, but you just verified my fears that they would fail too fast. There are commercial versions of those lights that might hold up better.


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David M


Posted By: Spectrum
Date Posted: 12/09/09 at 5:28pm

Well, now I understand your predicament, Mr. Lowell.  Even high power LED lamps can generate pretty good heat, and since they're a semiconductor, they would probably go the way your CFLs went, at a much higher cost.  I doubt they would be bright enough to light your needs, anyway.

I have built several news desk and talk show sets for TV studios that use the cool running fluorescent stage lights.  They're bright, but not very good at great distances, like it appears your venue requires.  I can look straight into them from less than 5 feet away and not feel a need for sunglasses as I'm SURE I would with your scoops.  (I'd PROBABLY be looking for some sun block as well!)  I'm not sure they are tremendously more expensive than incandescent fixtures, though.  The ones I've seen are basically a 20 inch square (approximately) of solid, packed fluorescent tubing on a flat surface.
 
Now I understand the 1000 watt scoops.  If I come across any SERIOUS lighting that runs efficiently and economically, I'll be sure to let you know.  Good luck!


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Growing old is mandatory. Growing up is optional.


Posted By: Gaafa
Date Posted: 12/13/09 at 5:18pm
This may help you out Danna. 
It is an ES glass capsulated halogen bubble [globe], that you can use in your floods [scoops] 
http://www.osram.com.au/_regional_APAC/pdf/Professional/General_Lighting/MARCH09_Halogen_ES_Brochure.pdf - http://www.osram.com.au/_regional_APAC/pdf/Professional/General_Lighting/MARCH09_Halogen_ES_Brochure.pdf
 
Check out  the 'Classic B' GLS candle B type as an alternative.


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      Joe
Western Gondawandaland
turn right @ Perth.
Hear the light & see the sound.
Toi Toi Toi Chookas {{"chook [chicken] it is"}
May you always play
to a full house}




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