Electronics > Beginners
Lab lights, how much are you happy with lights in your lab
sairfan1:
--- Quote ---do you have an outside window (sunlight) in your new space?
--- End quote ---
Yes i have a reasonable size window, and it really helps me while day time if its sunny my eyes feel really good, but i mostly work in the night that's why its a big issue for me.
--- Quote ---However i found that the light quality also depends on the color the walls are painted.
--- End quote ---
I was conscious about it, that's why specially i choose white color for my labs.
soldar:
I always had a couple pantograph lamps I could move around and place as needed. They get a lot of use and movement.
I used incandescent but in hot weather they give off too much heat.
Compact fluorescents were OK.
Finally I have transitioned to LEDs and I am extremely happy with the light intensity and color and they give off little heat.
dnwheeler:
DIY Perks (YouTube channel) has a project making LED "studio" lights (but generally useful, too). They have a high CRI and adjustable color temperature, and can be made fairly inexpensively.
3roomlab:
--- Quote from: dnwheeler on May 06, 2019, 07:36:20 pm ---DIY Perks (YouTube channel) has a project making LED "studio" lights (but generally useful, too). They have a high CRI and adjustable color temperature, and can be made fairly inexpensively.
youtube.com/watch?v=DhbMnQt14_o]https://www.youtube.com/watch?v=DhbMnQt14_o[/url]
--- End quote ---
*rephrased
I think the video is misleading
@ 5:15, the video shows what appears to be a very very very high end looking LED spectrum, sun like wavelength density.
and then at that moment he seems to suggest that is the LED sold on the ebay listing
a spectrum of such density is likely CRI98, but I think it is impossible for such a LED to be 120-140lm/W claimed by the ebay seller
if he claimed 95+ CRI without showing the spectrum, the china LED specs of 120-140lm/W might be plausible
but CRI 95+ in order to solve what he calls a "green" face, may or may not be the final outcome.
to shift into rich red spectrum, the led must have red peak at 630-650nm. not all CRI95+ have this peak. and the ebay seller does not display the spectrum.
(this is the spectrum capture of my cfl light, a common cfl. nothing special)
disclaimer : I am only a noob at lighting, but I cannot un-see this spectrum he showed
floobydust:
CRI is just a number, a bunch of math that can be fudged. It is not great with spikey (LED) spectrum. High-CRI does not work well with film photography but the number says it should.
The DIY fixture is two sets of three LED strips with different colours (ice blue, warm white, daylight pure white), each with a PWM dimmer. Not very bright, and better for background lighting, not task lighting.
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