Is it really 10 000 lux? Some website say it is only 3000 lux when places at 50 cm distance...
1302252
Don't forget that when the distance from a light doubles, its brightness should decrease by a factor of four (Inverse square rule). 50cm is about 20". I hold the light about 12" away as recommended. So yes, it is really 10,000 lux (the measure of energy emitted by the source).
490434
The claims of the # of lumens are all over the chart. Therefore not too reliable. You can see the valve at the bottom of a 5 ft 4" black pipe as brightas day with this little jewel. Best lite that I have ever owned. Well worth the $.
1645153
There are two settings: 8000 and 12000 lux. Also, the light emitted is not white; it is blue-green.
212727
I just looked at this on a different website. The package said it's 157 lumens (cheaper on amazon).
1290444
There is no international standard measurement of a light source when it comes to lumen. The light will produce apox 450 lum sq/ft at 1 foot away over an area of 1.5 feet at max spread. When max focused the light will produce well over 8,000 lum sq/ft at 1 foot away.You only need around 5~10 lum sq/ft to clearly see objects
1790322
1500 lux equals approximately 690 lumens at a half meter distance at 90 degrees light incidence...look up a lux to lumens conversion to get a sense of it since it's a function of distance and incident angle...i.e. this lamp is a fine desk lamp for all but the most meticulous of tasks...diff temps n intensities...I like it.
1892051
I bought the light and it is plenty bright. I think the true output is 520.The spot is very tight ans so using it to walk the dog is iffy. I added a removable diffuser to the lense. Another poing is that to turn it on you turn a knob. (Not what you expect).
984747
It is not bright enough. I was getting the one with 11 lights, originally. But after reading the reviews that said the one with 9 lights was really bright, I purchased that one. It is beautiful, but not nearly bright enough. So you should purchase the one with 11 lights.
1842959
This is de 80 lux version. But 80 lux is only the case when you use it in the full power mode. If you switch to ecomode you use 20 lux. I can tell you that until now I never met circumstances when I really needed the full power mode.
157574
While the lamp is designed for one user, it does have a large field of illumination. The lux level drops off as you move away from the center of the field (lamp), so 2 users who are close together might not receive 10,000 LUX, but a lower level of light. In that case, as long as they are getting at least 2,500 LUX to both eyes, there will be a therapeutic benefit, but the treatment time would need to be longer. For clarification, 2,500 LUX is the lowest level of light and 10,000 LUX is the maximum that have been tested in clinical studies. The relationship between LUX level and treatment time is linear - 10,000 LUX for 30 minutes, 5,000 LUX for 60 minutes and 2,500 LUX for 120 minutes. Of course, these are general guidelines and each user may have different responses to the light, so times will still vary. Always consult your physician before starting any light therapy program to ensure it is an appropriate option for you.
1102718
SAD lights produce between 10,000 lux and 20,000 lux. A day in summer produces between 80,000 lux to 120,000 lux.It appears really bright, because the eye has a non-linear response. Everyone responds differently to light . Special instructions for the product seems silly , because a sunny day has eight to ten times the ambient light and everyone responds differently.
1970970
Don't be fooled by all the shills for the seller. It isn't even 100 lumens. It's a perfectly acceptable light, just available elsewhere here for $8 for the exact same setup. If you do the math, there is no way that the voltage supplied by 3 AAA batteries is going to provide 500 lumens of light unless there are capacitors involved and then a half second of light.
810288
Before we've even took it out into the real world we tried it out at home . It is fricking bright. Could probably blind someone at close range if looking directly at it, I would think. In a brightly lit road, it's still visible, even in rain. I'd say it reaches about (from your standing point) to maybe a bit over twenty feet away? An approximate, tried it in an unlit hall.
1608191
At about 10 feet, the 127 light is about 5 feet wide and very direct. Insanely bright, and almost uncomfortably so. Double the distance, and you are looking at 1/4 the intensity, but with a 15 to 20 foot spread. It's hard to tell as I don't have a way to test it well right now. It is still rather bright at 15 feet as far as I've noticed. I hope this helps. This would not be a good light to illuminate a whole stage as it is very spot on. I have two right now, and they are actually really good spots for a small 20ft x 15ft to mid sized 30ft x 20ft stage. They need to be at least 8 feet away in my opinion. They also have some really good "sound motion" settings. You will be happy with these lights.
264583
Yes it is. You can also install it much farther, in order to get dim illumination. This fixture is a flood light, with a very wide angle of illumination, so maybe at 10 feet you may get more than 10 feet wide of light.
1138589
Barabara a 10,000 lux light is only 10 to 12 percent a bright as a summer day. It might be cheery to have as a light source.Everyone responds differently to light . SAD has been a problem for thousands of years and the medical establishment discovered it25 years ago. Actually, an engineer discovered it while recording his moods per time of day. I used to point clip on reflector lights ondepressed college students... years before the discovery...some depressed students recovered.
335212
The description on Amazon for the Day-Light Classic (the larger lamp) says you should be 12" away to receive 10,000 lux. The Day-Light Sky will require closer exposure than 12" because it is a smaller lamp, but I cannot find any details on this. I have emailed the company to find out the distance for 10,000 lux for both models.