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You can get many "chip-on-board" (COB) LEDs with more than 200 Lumen / Watt in the 2700 - 6500 K range. They are blindingly bright, emitting up to 2.000 Lumen f
by ThePhysicist 5y ago
You can get many "chip-on-board" (COB) LEDs with more than 200 Lumen / Watt in the 2700 - 6500 K range. They are blindingly bright, emitting up to 2.000 Lumen from a 5 mm² surface area, enough to permanently damage your retina if you get too close to them. A while ago I built a small light strip with several such LEDs, less than 25 € LED cost for more than 5.000 Lumen (a suitable control unit is around 10-30 € depending on whether you want it programmable and dimmable or not). So you could easily build a setup that delivers 100.000 Lux (maximum peak brightness you find outside during the summer at noon), though I'm not sure you'll enjoy it. Great for aquariums though.
- pharke 5y agoThe dangers of having a very strong point light source are, I think, a good argument for distributing the lights across a large area. Since distance matters with light intensity it would also help to never be very far from a lightsource wherever you go in a room. Maybe the best option would be to cover your ceiling in LED light strips or a bunch of those LED lights that look like fluorescent light fixtures.
- ThePhysicist 5y agoYeah but LED strips are less efficient in general. The appeal of the COB systems is that they have high Lumen / Watt ratios, drawbacks are the intensity and of course the cooling. I had some smoldered plexiglass from these COBs as the heat darkened it and the darker it got the more heat it absorbed. Pretty dangerous, so I also tend to use more smaller lights nowadays.