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Old November 23rd, 2007, 08:03 PM

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Default Fixture Distribution for better Coverage??

This is my first post. I am a church volunteer and in need of advice. We have a 60'w x 30'L x 21'h stage. 3 Electrics on stage with 4 sets Altman Cyc lights taking up 1st electric,
16 S4 Jrs lekos (575),
10 Source PARs(750w),
10 Parnels (750w),
and 14 PAR64.
It seems that its still not bright enough. With the exception of the Cyc lights, can anyone help me on how i can distribute these fixtures for better coverage?
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Old November 23rd, 2007, 08:21 PM
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Default Re: Fixture Distribution for better Coverage??

Welcome...

What degree are the S4's, what kind of lenses are in the pars? Do you have any color in any of the instruments?

How high are the electrics?

First, those cyc lights should be able to spit some serious light onstage. Are you just trying to cover the stage, or are you trying to do something artistic? Not know your set up... here is what I would "traditionally do.

Take the lekos and use them in a front light position IN FRONT of the stage, I have a feeling that the reason you think the stage is night bright enough is because everyones head is lit but their face is not.

Use the Par64 as side light, 2 on each end of the electric. That should give you a bit of pop.

Use the cyc lights as backlight from the 2nd and 3rd, that being if you can not use them on an actual cyc. Use the parnels as front light from the first, use the s4pars as extra side light (pipe-ends) or a backlight system.
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Old November 23rd, 2007, 08:24 PM
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Default Re: Fixture Distribution for better Coverage??

well, I think a little more description of how you have the place set up currently would help. Also, it would be useful to know the beam angles of your S4 Jrs. Which Altamn cyc lights do you have? Are the cyc lights lighting a cyc? Do you have any FOH lighting positions? What is the trim height of your electrics? All this is useful info for us to effectively help you out.

Also, take a minute and stop by the new member board and introduce yourself, we love new people!
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Old November 23rd, 2007, 08:42 PM
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Default Re: Fixture Distribution for better Coverage??

I think you have enough fire power to light the stage the question is about position.

Footer gave you a good strategy but in order to really help we need to know the degree of beams on those S4 jr.s, what lens is in your S4 Pars, and what beam spread lamps you are using in the 64's. Also we need to know your "Throw Distances"? To calculate your throw distance you have to go back to your high school geometry A squared +B squared= C squared. A typical calculation of throw distance is:

(Height of the instrument above the level of the stage - 6 feet) squared + (Horizontal distance from the instrument to the target area on stage) squared= (throw distance) squared

We remove 6 feet because we are concerned about the distance to head height not the floor.

Finally you mention 3 electrics on stage but nothing about lighting from out front. Do you have any? If you have no lighting positions out front anything we say won't matter, the faces are always going to be dark. Ideally, Proper front light consists of 3 lights all at a downward angle of about 45 degrees. There should be one pointing directly at the person from straight ahead and one coming in at a 45 degree angle from the left and one from the right. All of these should be out over the audience. For positions farther up stage you may be able to use your on stage electrics to get these angles.

If it isn't 45 high, the person on stage will have more difficulty being blinded by the light. As you move the light above 45 high then you will gradually get more downward shadows on the face. The two 45s to the sides eliminate side shadows on the face and to make it evenly lit from ear to ear. Sidelight, backlight, and down light from on stage all help to fill out the full dimension of the person, but without at least that one properly positioned front light you will always have dark eyes and faces.

(Charc all good points. I just think the problem is poor front light.)
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Old November 23rd, 2007, 08:45 PM
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Default Re: Fixture Distribution for better Coverage??

Quote:
Originally Posted by charcoaldabs View Post
Are there any lighting positions in the house, and not right above the stage? If so, and there is a possibility of adding some instruments, you could consider some S4s lamped at 750W and a narrow angle just to throw some more light down-range. If you don't care much, besides getting light, you can look for some free or cheap used instruments, something like the 1KL6 lamped with an FEL (1000W) would get you a lot of bang for your buck.
I might get ostracized for this comment, but if you really are looking for just light, and are not using color, shutter cuts, gobos or anything, you might be able to get some cheap 360Qs and throw an FEL lamp in there. These instruments were not designed for that amount of heat, so it will surely damage it overtime, but if the price was right, it might work as a temporary measure.
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I would not throw FEL's in anything in a church. Churches are the one stop place for turnkey installation. Usually when they buy a piece of gear it gets installed and moved maybe once in its lifetime. Sure... many mega-churches might hand a different show each week, but in general it gets put up there and forgotten. For theatre, you can SOMEWHAT get away with FEL's, in a church you will just have to go fix it in 2 months.

Pretty good otherwise.
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Old November 23rd, 2007, 08:49 PM
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Default Re: Fixture Distribution for better Coverage??

I agree with everything Charc said, except for the 360Q idea. Mostly because though I doubt you would be in serious danger, voiding the UL rating with the FEL could also cause insurance problems should something go wrong.

BUT the 1kl's pop up on ebay all the time and usually at cheap prices.
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Old November 23rd, 2007, 09:19 PM
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Default Re: Fixture Distribution for better Coverage??

So gaff is a firm believer in the McCandless method, nothing wrong there. Depending on FOH positioning and beam angles it may be simpler and more effective to just have a flat front light wash. Your frontlight wash may extend onto your over-stage electrics to light the US areas.

Charc, sometimes I wonder how much info from here makes it in your head. How many posts have you read about how the FEL is not an ideal lamp. I am sure that Ship has posted 10+ posts about better lamps than the FEL. You should search them out, and then stop using FELs in your lights. Also, a S4 Jr. can't be lamped at 750w, so that idea is out.

Effectively utilizing your S4 Jrs. is hard to speculate on without knowing the beam angle. But in a way it is somewhat 6-in-1 half dozen in the other on account of if you only have wide angle units you may need to double up to get the intensity you need, but if you only have narrow units you may need more to get the coverage you need. I would take the S4 PARs and arrange them evenly with 4 on the 1st and 3 on the second and third electrics. Use the PAR64s as side light pipe ends (I think mentioned above), 3 on each side of the first and second, and 2 on each side of the third elec. As for the PARNels, use them to fill where needed, but personally I would find some sucker would will trade for S4 PARs, or just sell them and buy a real fixture.

I have to imagine that the "cyc" lights you have are more like strip lights, MR-16 or R-40. Otherwise, it seems highly illogical to hang cyc lights on the first electric, probably the farthest from a cyc. If you really have strips and not cyc's this will help with your top light, and could allow you to spread your s4 PARs to other locations.
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Old November 23rd, 2007, 09:37 PM

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Default Re: Fixture Distribution for better Coverage??

Thanks for the quick reply
Well, we have:
Source4's are 25-50 degrees,
Source PAR's have narrow lens,
Parnels have wide.
We also have two 20ft. electrics at FOH. (sorry forgot to mention) approx.80ft throw distance. all 3 electrics are 21 ft. from stage floor.Stage electrics approx. 12 ft. from each other.
(Re: Cyc lights, so the electric closest to Cyc upstage isn't 1st electric?)
This is a new world for me and im still learning fixture functions and properties.

Last edited by CACtechdude21; November 23rd, 2007 at 09:50 PM.. Reason: forgot word
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Old November 23rd, 2007, 09:41 PM
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Default Re: Fixture Distribution for better Coverage??

Eighty foot throw distance? The largest thing you want at that distance is a 26 - and that's still kinda big. That sounds like the realm of 10 to 15 degree units.
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Old November 23rd, 2007, 10:49 PM
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Default Re: Fixture Distribution for better Coverage??

Quote:
Originally Posted by CACtechdude21 View Post
Thanks for the quick reply
Well, we have:
Source4's are 25-50 degrees,
Source PAR's have narrow lens,
Parnels have wide.
We also have two 20ft. electrics at FOH. (sorry forgot to mention) approx.80ft throw distance. all 3 electrics are 21 ft. from stage floor.Stage electrics approx. 12 ft. from each other.
(Re: Cyc lights, so the electric closest to Cyc upstage isn't 1st electric?)
This is a new world for me and im still learning fixture functions and properties.
Standard position numbering has the lowest number position closest to the proscenium. So, over stage positions number from DS to US and FOH positions number going away from the stage.

Since you have S4 jr. zooms, you can set a bunch at the narrow end and use them for front light. As Footer said, 25˚ is about the widest you would want from that distance. At 80' you would probably love to be in 14˚ land, but, cest la vie. If intensity is your big problem then following gaff's idea with the three point front light is probably the best way to go. That will eat most of your ERS fixtures, which is OK.

It wold be worth investigating to see if the church has the other lenses for the S4 PARs, they came with all 4, and you would probably be happier with mediums or wides.

So you actually have real cyc lights, well, those will light your cyc real well. It is hard to use them for any other purpose as they are designed to push as wide a spread as possible.

Sounds like most of the afore mentioned ideas should do quite well for you.
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