Would make sense to build a studio light made of led stripes?


sebas77

Link Posted 24/09/2018 - 10:30
I am sure someone tried or didn't even try because already knows is not a good idea and that's why I am writing here, to start gathering some info. What would a 100w equivalent set of led stripes look like? Would make enough light for a studio or would be still not barely enough? We can decide to go even higher, like 500w, but what would it look like, I mean how much light intensity would it emit? I have no clue

Chrism8

Link Posted 24/09/2018 - 11:54
Hi Seb

I've used 2 of these previously for a shoot, input is 20w ea and the light out is 1600 lumens each, ( 6000 lumens is equiv to about 400w output ) which sounds a lot, but it means you'll still be on a high ISO with aperture fairly wide open or a long-ish shutter speed. For example I've done some figure shots where these were used and the exposure was 1/60 sec ISO 1250 F4.5

The light from decent quality LED's is fairly good, usually about 5500 Kelvins which is equiv to a cloudy overcast day.

The main issue is controlling the light from lights not designed to be used for photography, I've got a 6000 lumen unit 240v LINK which is a replacement for a 400w halogen, its great, the light is good, but its full blast or nothing, and difficult to flag or direct, you can diffuse it more with sheets of paper etc.

I have used it once for a shoot where it was great for just blasting light at a portrait group and not frying them with the heat from the element.

Hope this is helpful.
Chris

www.chrismillsphotography.co.uk

" A Hangover is something that occupies the Head you neglected to use the night before".

-------------------------------------------------------------
K1 - Pentax 100 Macro F2.8 - Sigma 85mm F1.4, Pentax 150 -450 F4.5 / 5.6

Pentax FA 24 - 70 F2.8, Sigma 100-300 F4, Samyang 14mm F2.8, Sigma 70-200 F2.8,

K5iis - Sigma 17 - 70 F2.8, Sigma 70 - 300 F3.5/F5.6, Sigma 18 - 200 F3.6 / F4.5.
Last Edited by Chrism8 on 24/09/2018 - 12:03

stub

Link Posted 24/09/2018 - 17:09
I think Chris has more or less hit it on the head there... They are not controlable or have a range of modifiers that are easily attached. I dont think the 100w would be a problem. you just shoot at a wider aperture.
No problem with your or 85 1.4..
K-1Gripped K-1 ungripped K-5ii K7 Various lenses

Stuart..

sebas77

Link Posted 25/09/2018 - 08:11
Thank you. I was thinking about building something wide that could emulate a window, but I am not sure it would be a waste of time

Chrism8

Link Posted 25/09/2018 - 08:29
Hi Seb,

The second link I gave you would work as a window light, you'd probably need to hang a sheet or similar in front of it to act as a further diffuser, this could then give you the option to add fake window bars with black tape ?
Chris

www.chrismillsphotography.co.uk

" A Hangover is something that occupies the Head you neglected to use the night before".

-------------------------------------------------------------
K1 - Pentax 100 Macro F2.8 - Sigma 85mm F1.4, Pentax 150 -450 F4.5 / 5.6

Pentax FA 24 - 70 F2.8, Sigma 100-300 F4, Samyang 14mm F2.8, Sigma 70-200 F2.8,

K5iis - Sigma 17 - 70 F2.8, Sigma 70 - 300 F3.5/F5.6, Sigma 18 - 200 F3.6 / F4.5.

sebas77

Link Posted 25/09/2018 - 15:05
cool cool, what aperture speed did you use with that? TBH I am not 100% sure it's a good idea, as I mainly use flashes, I was just wondering if could create a more soft look, kike a window, but probably needs a big diffuser in front of it anyway

Chrism8

Link Posted 25/09/2018 - 15:16
Hi Seb

This image was shot for a local band for a CD cover a few years ago, using the Defender LED 6000, K5iis 800 ISO and 1/13th sec F3.5 direct light, i.e no softening material.



Chris

www.chrismillsphotography.co.uk

" A Hangover is something that occupies the Head you neglected to use the night before".

-------------------------------------------------------------
K1 - Pentax 100 Macro F2.8 - Sigma 85mm F1.4, Pentax 150 -450 F4.5 / 5.6

Pentax FA 24 - 70 F2.8, Sigma 100-300 F4, Samyang 14mm F2.8, Sigma 70-200 F2.8,

K5iis - Sigma 17 - 70 F2.8, Sigma 70 - 300 F3.5/F5.6, Sigma 18 - 200 F3.6 / F4.5.

sebas77

Link Posted 25/09/2018 - 15:28
yes it's pretty good thanks a lot!
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