Re: Building a Light Panel
In the interest of sharing what I've learned I'll pass this along.
I bought Flexfire's Industrial Series light tape 4200K. It's a company that publishes specs including picking from the same bin for color consistency. After reading reviews about some of the cheaper options out there I decided I'm not going through the expense and work to have some failures of LED's. Fortunately I bought everything during their cyber week sale which essentially gave me the drivers for free.
The requirement for these ultra bright LED's is the use of a heat sink. I found one, 5.5" x 11.8" that will hold one roll 9'10" of lights. I'll make two of these to fit on the two light stands I already have. I expect to have enough light to bring my exposure times down to 1/15 or faster with my aperture and film choice.
Re: Building a Light Panel
Great, let's see more, when you have more!
I bought 2-900 Led 5000K Video lights maybe 5 years ago, $500 each. Still work fine.
I also bought a bi-color 600 Led panel which is 50/50 2800K and 5600K. I really dislike that one, as I never use 2800K then only get light from the 300 5000K bulbs.
I recently bought 18 48" LED 6500K shop lights. These weigh nothing. I am using 12, one failed, I have 5 spares left. Failure was flickering on and off, not temperature related. There are made of ribbon LED inside a diffuser.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
You can see them on my Paint an Elwood thread. http://www.largeformatphotography.in...=1#post1418076
Re: Building a Light Panel
Quote:
Originally Posted by
chris_4622
In the interest of sharing what I've learned I'll pass this along.
I bought Flexfire's Industrial Series light tape 4200K. It's a company that publishes specs including picking from the same bin for color consistency. After reading reviews about some of the cheaper options out there I decided I'm not going through the expense and work to have some failures of LED's. Fortunately I bought everything during their cyber week sale which essentially gave me the drivers for free.
The requirement for these ultra bright LED's is the use of a heat sink. I found one, 5.5" x 11.8" that will hold one roll 9'10" of lights. I'll make two of these to fit on the two light stands I already have. I expect to have enough light to bring my exposure times down to 1/15 or faster with my aperture and film choice.
What is the CRI of these LEDs? Do you need to use a special paint or reflective surface or special acrylic to get the CRI into the photo range of 90 or higher? For best color the CRI of the system should be 95 or above.
Re: Building a Light Panel
Quote:
Originally Posted by
Randy Moe
Great, let's see more, when you have more!
I bought 2-900 Led 5000K Video lights maybe 5 years ago, $500 each. Still work fine.
I also bought a bi-color 600 Led panel which is 50/50 2800K and 5600K. I really dislike that one, as I never use 2800K then only get light from the 300 5000K bulbs.
I recently bought 18 48" LED 6500K shop lights. These weigh nothing. I am using 12, one failed, I have 5 spares left. Failure was flickering on and off, not temperature related. There are made of ribbon LED inside a diffuser.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
You can see them on my Paint an Elwood thread.
http://www.largeformatphotography.in...=1#post1418076
Was the failure immediate (or almost immediate) or after some period of usage?
Re: Building a Light Panel
Re: Building a Light Panel
Quote:
Originally Posted by
HMG
Was the failure immediate (or almost immediate) or after some period of usage?
Failed after 3 weeks of 4 hours a day usage. Just started flashing on and off.
I hope they work, they use 20 watts per and the light is pleasant for me.
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Re: Building a Light Panel
Quote:
Originally Posted by
Bob Salomon
What is the CRI of these LEDs? Do you need to use a special paint or reflective surface or special acrylic to get the CRI into the photo range of 90 or higher? For best color the CRI of the system should be 95 or above.
I bought the 42K. I'm not concerned about the CRI for B&W film and for video there are options for managing color.
The CRI reminds me of Wine Spectator's ranking numbers, the mind thinks the higher the number the better. But what if you just don't like that wine...I know color is not wine but what I'm saying is there are other things to consider than just a high CRI.
Re: Building a Light Panel
Quote:
Originally Posted by
chris_4622
I bought the 42K. I'm not concerned about the CRI for B&W film and for video there are options for managing color.
The CRI reminds me of Wine Spectator's ranking numbers, the mind thinks the higher the number the better. But what if you just don't like that wine...I know color is not wine but what I'm saying is there are other things to consider than just a high CRI.
It sounds like you may a victim of some bad info. CRI is not a measurement of color, its a measurement of how faithfully the full spectrum of color can be represented. It matters for black and white.
If a specific frequency is underrepresented by your light, anybobjects in your frame that have a color correpsonding with the frequency will appear unnaturally dark in the final picture.
Re: Building a Light Panel
Quote:
Originally Posted by
AFSmithphoto
It sounds like you may a victim of some bad info. CRI is not a measurement of color, its a measurement of how faithfully the full spectrum of color can be represented. It matters for black and white.
If a specific frequency is underrepresented by your light, anybobjects in your frame that have a color correpsonding with the frequency will appear unnaturally dark in the final picture.
Unfortunately, CRI isn't all that good of a light quality measure. See: http://leapfroglighting.com/attentio...nger-relevant/