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Low energy Floodlights.


MapleLight

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Hi Everyone,

Topic number 2. Outdoor lighting.....(Again)

 

I have two questions, firstly has any one used low energy floodlights with colour gels?

The products I've been looking at are these;

 

http://www.eterna-li...?product=SL226W

http://www.eterna-li...?product=FL157B

 

Im planning on using them with colour gels to uplight trees.

These units obviously will not replace 300/500W halogens, but keen to hear any feedback before I buy.

 

Secondly, looking for a place to get these at trade (in the UK)

 

Many thanks

Jason

MapleLight

wedding Lighting Services

www.maplelight.co.uk

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Haven't used either sorry. Remember though that they will still get hot, probably hot enough to melt gel stuck straight on the unit so probably best to space gel in a frame off the unit. Also worth checking photometric/ beam spread data to ensure that they are wide enough for your purposes (may not end up quite as large a beam as a standard flood)

 

2x26w = approx 260w "standard" lightbulb" so probably = 300w halogen.

The 57w will give you a little bit more output, but probably a more concentrated "beam" given it's from a single source

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I have often used gell with low energy floodlights, both d0m3sticly and at work.

The results are generaly very good. All light sources produce some heat, but these dont get nearly as hot as either theatre lanterns or halogen floodlights.

For very short term use attach the gell externaly with gaffa tape. For longer term use, cut a suitably sized piece of gell to neatly fit inside the light, covering the inside of the clear plastic cover.. This is a rather tedious job as the covers are not flat.

Replace the gell whenever re-lamping.

AFAIK gell frames are not available for this sort of light.

 

Remember that the flourescent lamps come in warm white and cool white or daylight.

It would be well to choose carefully to maximise the output of filtered light.

 

For blue, violet, and blue green or similar colour gells, use daylight lamps.

For red, orange, yellow, or similar gells use warm white lamps.

 

The output of halogen and floursecent lamps vary a bit, but as a rough guide the flourescents give about 4 times the light output of halogen.

I would expect a pair of 26 watt lamps to be at least as bright as 200 watt halogen, but not as bright as 300 watt halogen.

Deep blue gell over a daylight flourescent lamp can be TEN times as bright as the same gell over over a halogen lamp, on account of the greater blue content from the flourescent.

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The calculations I was using was based on compact fluro (CFL) being approx 5x more powerful than incandescent. Would suspect that seperate ballasted lamps such as this are somewhat more efficient.

 

Some good and interesting points above :)

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Thank you all so much for your great comments and information.

Based on this, I will buy a couple of units and try out them out before placing a big order.

 

I will only be using blue or green gels on these units, will let you know.

 

Cheers Guys.

Jason

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