91–100 of 294 posts
I made some notes about this in 02013 https://dercuano.github.io/notes/10klux-led.html and 02017 https://dercuano.github.io/notes/illumination-cost.html which may be of interest to anyone trying this, but Eliezer and Raemon tried the experiment and published their notes before I published Dercuano in 02019.
Why put leading zeroes in years?
I tried doing something like this last year, I purchased lots of 1000 lumen LED bulbs. The light was blindingly bright to look at and it looks very strange in a room. My takeaway was: * that you need some type of diffuser. * The light leak out of the apartment was crazy. My apartment looked completely insane from the street. * The light warmth is very important. And proper sun coloured lamps don't exist or are crazy…
"Warmth" and "naturalness" are produced by high CRI index (90+). I have 8 lamps with CRI 90+ in my living room, at 5000K color temperature, 1500 lumens each. They produce nice light that seamlessly mixes with daytime sunlight from the window: they seem to have the same color. I also have a few LED strip installation over desks and tables, very bright at max dimmer setting. A diffuser is a must, even though it lowers…
90-95: Can be ok, or not. Depends. Different lights will likely not mix at the same color temperature.
98: Good
99-100 full spectrum cyberlight: As good as Halogen and only ~30x as expensive.
I love the idea of this mirror that sits outside, and moves with the sun, to reflect more sunlight in through your window: https://solenica.com/ Unfortunately, I don't have a lot of confidence in it... the company has been looking at building this product since about 2013 (same founder created a similar product on indiegogo called "Lucy") and neither product seems to be on the market yet (uncertain if the indiegogo p…
If you ever wondered what makes LED lights feel great: it's the strategic mixing of LEDs with different characteristics. Here's a free tool that helps designing such fixtures: https://www.meerkatblog.com/ledmixing
I'm confused - most LED will not make you feel great (unlike incandescent light) - on the contrary, you have to put in a lot of effort to get decent light from LEDs.
I take a hobby interest in lighting as design and art, and probably have more lamps than I should have. My personal view is that it's not really an area that is being ignored. There are a lot of companies in this space developing new lighting. One thing that concerns me about investing a lot into current LED lighting is that it seems like the tech is still evolving. At least that is my impression. I don't really like…
IKEA has these backlit fake windows they use in store displays in their curtain section. I wish they would sell the fake windows as well. The light actually looks natural.
> Someone should probably start a bright home lighting company Such a thing already exists. Its called a lighting design company. People need to admit that lighting (like cryptography) is hard, and that if you're serious about "doing it right" you need to bring in a suitably skilled professional. Each house/apartment is different and every room within it is different, you'll never be able to magically buy good lighti…
Anyway, these tubes don't seem to be too expensive and they are basically free to operate. And with modern head units they seem to capture the most sunlight possible, even on overcast days.
[0] https://www.youtube.com/watch?v=VP2APH2TKyY [1] https://solatube.com/
I tried doing something like this last year, I purchased lots of 1000 lumen LED bulbs. The light was blindingly bright to look at and it looks very strange in a room. My takeaway was: * that you need some type of diffuser. * The light leak out of the apartment was crazy. My apartment looked completely insane from the street. * The light warmth is very important. And proper sun coloured lamps don't exist or are crazy…
Downside is you need a 70A 28V power supply and a semi-massive cooling system. And bulb lifetime is approx. 1 year of normal use.
Adding more lux just makes your pupil smaller. Or am I missing something? Maybe its non linear? Or maybe the idea is to reach the minimal pupil diameter? Or maybe happiness is somehow dependent on pupil diameter?