If you want to experience gloomy, come visit the coast of BC where it rains almost nonstop for 6 months over the winter. ๐ ๐ ๐ We coastal people that were born & raised here are a hardy bunch and not bothered by SAD. ๐
To put into context, a 4 foot fluorescent lamp is rated 2850 lumens. I have seen articles in the past talk about using a 4 foot fluor. fixture with 2 or 4 lamps. 50,000 lumens is much higher than you need, that is *if* it really does produce that. The surface area of the LEDS is MUCH smaller compared to a 4' fluorescent tube so glare is likely to be a big problem. You want the light source to have as large a surface area as possible, which is why indirect light or fixture with opaque diffuser is good. Distance from the lamp(s) and type of light fixture (point source like say a puck light vs linear fixture/lamp) will affect the light level in footcandles reaching the eyes.
Most commercially available SAD light fixtures are rated 10,000 lumens and are placed about 18-24" from the face for about 15-30 mins per day. Mayo Clinic has a good article on SAD and lights here. Lower output lamps can be used but "therapeutic" sessions may take longer.
Note that "lux" is a metric measure of light level and footcandles is in sq. ft., both in terms of square area. Lux/footcandles on a surface varies as the distance from the light source. "Lumens" is the light output of the particular light source (LED chip/bulb/lamp). The Mayo Clinic article incorrectly refers to a 10,000 lux light fixture as do some other websites I came across.
Or, why not concentrate the light directly where it's needed - on the eyes. Re-timer has these light therapy glasses. Now you can go to the mall, out for dinner or to a movie and improve your well-being without having to sit under a light fixture at home. Think of all the looks and compliments you'd get... ๐ Also helps for those affected by jet lag, shift work and trouble sleeping.
To put into context, a 4 foot fluorescent lamp is rated 2850 lumens. I have seen articles in the past talk about using a 4 foot fluor. fixture with 2 or 4 lamps. 50,000 lumens is much higher than you need, that is *if* it really does produce that. The surface area of the LEDS is MUCH smaller compared to a 4' fluorescent tube so glare is likely to be a big problem. You want the light source to have as large a surface area as possible, which is why indirect light or fixture with opaque diffuser is good. Distance from the lamp(s) and type of light fixture (point source like say a puck light vs linear fixture/lamp) will affect the light level in footcandles reaching the eyes.
Most commercially available SAD light fixtures are rated 10,000 lumens and are placed about 18-24" from the face for about 15-30 mins per day. Mayo Clinic has a good article on SAD and lights here. Lower output lamps can be used but "therapeutic" sessions may take longer.
Note that "lux" is a metric measure of light level and footcandles is in sq. ft., both in terms of square area. Lux/footcandles on a surface varies as the distance from the light source. "Lumens" is the light output of the particular light source (LED chip/bulb/lamp). The Mayo Clinic article incorrectly refers to a 10,000 lux light fixture as do some other websites I came across.
Or, why not concentrate the light directly where it's needed - on the eyes. Re-timer has these light therapy glasses. Now you can go to the mall, out for dinner or to a movie and improve your well-being without having to sit under a light fixture at home. Think of all the looks and compliments you'd get... ๐ Also helps for those affected by jet lag, shift work and trouble sleeping.
MEXICOWANDERER wrote:
Whoa. Lots of money. As in way way too much. Reflected white light works well. 4,800K is what I use to project sunlight.
Lots of issues. Those light bars MUST be cooled by an air current. Lit and unmoving your light bar will gain 50-60F over ambient air temperature. The chips do not like it.
With 100+ of the small CREE lights and a few dozen 100+ watt bars "under my belt" I have formed some opinions about the lamps themselves and what they do for a living. The house I am in is a cave. It needs artificial lighting at high noon on summer solstice.
Blue and green tint belong in a B grade horror flock. Very amber light does best in a Wal-Mart parking lot or on the San Francisco Oakland Bay Bridge.
Try a pair of these. One cold white the 2nd warm white. They are 12 volt which cost more than line voltage 120vac lamps. Position the lamps one atop the other to render close to daylight color spectrum. They are easier to mount than the light bar, use a fraction of the power and most importantly render a wide angle flood pattern.
https://www.ebay.com/itm/10W-20W-30W-50Watt-12-Volt-DC-Low-Volt-Led-Floodlight-Black-Grey/1716263078...
To save money choose a 120vac model
https://www.ebay.com/itm/10W-20W-30W-50W-70W-100W-150W-200W-LED-Flood-Light-Garden-Landscape-Spot-La...
Remember ๐ One colt white and one warm white.
link correction
