Question about lighbulbs

2523 posts
16 years
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Posted 26/07/2012 - 14:54 Link

I just bought a lamp that has a very nice reflector on it, the lamp gives off a very nice, fairly narrow and even light. I want to try using it in the studio, in conjunction with fill-in flash through a soft-box. Does anyone know if there are any light-bulbs available that would be the same colour temperature as my flash? Preferably a bulb of the energy-saving variety, as I will then be able to use a more powerful bulb.

Flurble

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Don Don

6213 posts
20 years
Winterpeg Manitoba Canada

Posted 26/07/2012 - 15:05 Link

anything marked "daylight" color balance, also look for "full spectrum" and "grow" lamps...
for a slightly warm look go with "natural white" if using florescents, keep your shutter speeds below 1/125.

also consider using a cto gel on your flash to warm it up a bit to matchnormal halogen or incandescant lights...

Fired many shots. Didn't kill anything.

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johnriley johnriley

24425 posts
24 years
Tyldesley,
Manchester

Posted 26/07/2012 - 15:11 Link

You could always use a filter over your flashgun to make any minor adjustments you felt were necessary.

Best regards, John

paulgee20 paulgee20

802 posts
17 years
Sat in Chair

Posted 26/07/2012 - 15:22 Link

Your flash will have a colour temp rating of 5200- 5400k [Kelvin], (cool colours - bluish white - near daylight), where you should get consistent colour results.
Tungsten is around 3200k

Metal Halide lamps are nearly always around 5000-5200k but tend to be a little expensive and generally dont hot start.

You can buy Tomato grow lights which would give you the needed range.

Paul

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Don Don

6213 posts
20 years
Winterpeg Manitoba Canada

Posted 26/07/2012 - 15:29 Link

also some of these lights put out a fair bit in the uv range, so the uv filter might help a bit, can't hurt... I've not needed one but, some people swear by them.

Fired many shots. Didn't kill anything.

paulgee20 paulgee20

802 posts
17 years
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Posted 26/07/2012 - 16:58 Link

Most of these emit fairly high levels of both UV and IR, but generally are always shielded. The probability of any UV damage/degredation only really occurs when the lamps/housings are damaged.

As far as skin damage is concerned it is the UVA (longer wavelength) and UVB (medium wavelenght) and a lot more damaging than UVA. This spectrum is between 100 and 400 nanometers.

UVC is the serious one, (Atmosphere screened) - this is where a lot of the Ozone layer, or lack of it, gets some bad press.

Paul

aliengrove aliengrove

2523 posts
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Posted 27/07/2012 - 09:05 Link

Thanks, all, I will try out a daylight bulb and see how it works out. Most of my lenses have UV filters on them si I will try with and without the filter.

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aliengrove aliengrove

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Posted 27/07/2012 - 09:06 Link

Don wrote:
anything marked "daylight" color balance, also look for "full spectrum" and "grow" lamps...
for a slightly warm look go with "natural white" if using florescents, keep your shutter speeds below 1/125.

also consider using a cto gel on your flash to warm it up a bit to matchnormal halogen or incandescant lights...

What is a cto gel?

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paulgee20 paulgee20

802 posts
17 years
Sat in Chair

Posted 27/07/2012 - 09:14 Link

Colour correction gels, (like filters. The main color correction gels are CTB (color temperature blue) and CTO (color temperature orange). A CTB gel converts tungsten light of 3200K to 'daylight' color. A CTO gel performs the reverse.

Regards

Paul

tyronet2000 tyronet2000

4862 posts
15 years
Northumberland

Posted 30/07/2012 - 07:23 Link

Quote:
Colour correction gels, (like filters. The main color correction gels are CTB (color temperature blue) and CTO (color temperature orange). A CTB gel converts tungsten light of 3200K to 'daylight' color. A CTO gel performs the reverse.

Thanks, that saved a Google

Regards
Stan

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grahamwalton grahamwalton

477 posts
24 years
Birmingham UK

Posted 30/07/2012 - 18:03 Link

Permajet sell energy saving, 30 watt, daylight bulbs in either screw or bayonet fit. They are about £12.

Friendly Regards
Graham

Don Don

6213 posts
20 years
Winterpeg Manitoba Canada

Posted 30/07/2012 - 19:32 Link

daylight balanced cfls
dolly shot using the light from above video

Fired many shots. Didn't kill anything.

gartmore gartmore

6724 posts
20 years
Glasgow,
Scotland

Posted 30/07/2012 - 22:38 Link

aliengrove wrote:

What is a cto gel?

Colour Temperature Orange, comes in full, half and quarter.

Ken
“We must avoid however, snapping away, shooting quickly and without thought, overloading ourselves with unnecessary images that clutter our memory and diminish the clarity of the whole.” - Henri Cartier-Bresson -

Edited by gartmore: 30/07/2012 - 22:39

aliengrove aliengrove

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Posted 01/08/2012 - 05:55 Link

Thanks, folks, and thanks for the links, Don, good stuff!

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