3 ms·

This also seems like a choice. There is no reason LED's cannot create warmer light, and there is probably a solution to scatter the rays and not give that "cli

by skohan 6y ago

This also seems like a choice. There is no reason LED's cannot create warmer light, and there is probably a solution to scatter the rays and not give that "clinical" kind of light which LEDs are known for. I have an LED desk lamp with a temperature setting, and when it's on the warmer settings it really does produce a pleasant light.

quickthrowman 6y ago
LED lights do in fact have the ability to do different color temps, some fixtures have tunable color temp as well. In my home, I use lamps that output 2200-2700K depending on the dimmer setting. Lower color temps output less lumens per watt, and the goal of exterior lighting is generally to improve visibility, hence the 4K color temp. Here’s a cutsheet for a Lithonia wall pack fixture showing the different options, there’s also a chart showing what the lumens per watt is based on the color temp: https://img.acuitybrands.com/public-assets/catalog/1008038/wdge2-led.pdf?abl_version=03%2f03%2f2021+15:50:38&DOC_Type=SPEC_SHEET https://img.acuitybrands.com/public-assets/catalog/1008038/w...
- MayeulC 6y ago
  The color a LED emits is given by the choice of materials (specifically, the band-gap, with E=hν, ν being light frequency https://en.wikipedia.org/wiki/Band_gap#Light_emitting_diodes_and_laser_diodes https://en.wikipedia.org/wiki/Band_gap#Light_emitting_diodes... ) "Tunable" LEDs are just multiple LEDs, the goal being to change the emission peak. Peak wavelength can be mapped onto a black body temperature trough Wien's law (λpeak =2.8e-3/T) https://en.wikipedia.org/wiki/Wien%27s_displacement_law https://en.wikipedia.org/wiki/Wien%27s_displacement_law I don't really know how the mapping is done, though, as there are different ways to map it since the LEDs won't have the same emission curve as a black body.

3 ms·

This also seems like a choice. There is no reason LED's cannot create warmer light, and there is probably a solution to scatter the rays and not give that "cli

by skohan 6y ago

quickthrowman 6y ago
LED lights do in fact have the ability to do different color temps, some fixtures have tunable color temp as well. In my home, I use lamps that output 2200-2700K depending on the dimmer setting. Lower color temps output less lumens per watt, and the goal of exterior lighting is generally to improve visibility, hence the 4K color temp. Here’s a cutsheet for a Lithonia wall pack fixture showing the different options, there’s also a chart showing what the lumens per watt is based on the color temp: https://img.acuitybrands.com/public-assets/catalog/1008038/wdge2-led.pdf?abl_version=03%2f03%2f2021+15:50:38&DOC_Type=SPEC_SHEET https://img.acuitybrands.com/public-assets/catalog/1008038/w...
- MayeulC 6y ago
  The color a LED emits is given by the choice of materials (specifically, the band-gap, with E=hν, ν being light frequency https://en.wikipedia.org/wiki/Band_gap#Light_emitting_diodes_and_laser_diodes https://en.wikipedia.org/wiki/Band_gap#Light_emitting_diodes... ) "Tunable" LEDs are just multiple LEDs, the goal being to change the emission peak. Peak wavelength can be mapped onto a black body temperature trough Wien's law (λpeak =2.8e-3/T) https://en.wikipedia.org/wiki/Wien%27s_displacement_law https://en.wikipedia.org/wiki/Wien%27s_displacement_law I don't really know how the mapping is done, though, as there are different ways to map it since the LEDs won't have the same emission curve as a black body.