What is the LUX rating? (Lux = unit of light flow). I read that to be effective for light therapy it should be at least 2500lux.
62770
I do not know about LUX ratings, but I do know that the Verilux light that I ordered makes my scalp so hot it caused me to have dermititus on my scalp, a very uncomfortable, itchy rash.
988356
When I was shopping for this lamp, I was specifically looking to treat my SAD. I researched what type of lights helped SAD best, found this brand, and am very very happy with my purchase. To treat SAD, I use this one and a smaller light (I have 2) for about 2 hours in the morning while it's still dark out. It could be used as a full-spectrum lamp (it's not harmful) but it is VERY bright. Almost equivalent to daylight. Hope this helps!
2226235
Thanks for your inquiry. This unit has a Working Ambient Illumination of up to 2000 lux.
547549
for me, using a high wattage bulb with this fixture causes too much brightness which makes it harsh in the eyes. For me, this 5W LED bulb that gives off 350 lumens is just enough. It works great for me. Hope it helps Triangle Bulbs T90020 (Pack of 2) G16 Decorative Globe Light Bulbs 300 Lumen 5-watt LED Light Bulb with E26 Base, Color 3000K, Dimmable, UL Listed, Energy star certified,
140481
I would strongly suggest the bulb strength advised. The notice is there for a reason. Unfortunately, I find that most lamps, pendants etc. have insufficient lighting for my 40+ old eyes!
2204094
I did a discharge test and it went for ~ 4 hours before the light intensity started to drop. After 5 hours the intensity dropped faster but even after 7.5 hours it was still putting out useable light. I'd post a photo of the discharge plot but I can't see how to do it for this product.
741498
12" is the distance to get the 10,000 LUX light level and you can increase the distance, but you would need to also increase the time of exposure. The drop off in intensity at 24" would be to about 2,500 LUX. This is the lowest level clinically tested and for comparable response most would need two hours of exposure at this level. However, keep in mind that your individual response may be different and you may need more of less time. It may take a few days to 2 weeks to find the right balance of time and distance to gain the benefits. CET.org is a great resource for information and they have free self-assessment tools to determine the best time in the day to use the lamp based on your own schedule. CFL bulbs lose intensity as they age, so the LUX level will diminish as the lamp is used and therefore you may not be getting the expected LUX level. Two years for replacement of the bulbs is a general rule, but will vary based on usage. If in two years, the lamp is still providing the same benefit in the same time, then there would be no need to replace the bulbs.
264896
So how much LUX (watts/sqm) does it emit and what wavelength do the UV C have? thank you
293009
The info. I got was 500. I have no way of testing it. At 500 or 600 its still super bright. I saw a test where it beat a 800 lumen light.
1547941
From the instruction manual:Light-measuring levels ranging from 0.1 lux to 200,000 lux with auto zeroing and corrected for luminous efficiency function (manually calculated for non-standard light sources).Accuracy is described as: +- 3%+10dgt with a repeatability within 2%.ChuckJ
282987
If your bulb size is H8 should be good. I like the ouput of the cree led. Better price tag than the lux angel eyes thats for sure.
471507
For the medical therapy effect the most meningful unit of measure is lux, i.e. the intensity of the light impacting the human skin or ear tissue. Valkee's light intensity in the ear canal is about 10,000 lux, which corresponds with the intensity of big tabloetop bright light lamps that need mains electricity. 10,000 lux is also the required intensity for bright light devices to be approved for medical insurance reimursability in the few countries where it is a reimbursable insudred cost for treating SAD.
1794254
It is a 5000K bulb, no? While it is not labeled "Daylight," Daylight lamps are often ~5000K, sometimes higher, the higher the more like daylight. I myself consider it to be a "Daylight" bulb, and I use it as a GroLight for my houseplants and seedlings. They love it, and they are the ones with the final vote: they say, "Aye."
1668752
I don't know what the lux rating is but the infrared illumination in them works ok close up. The ones I have installed high on my building don't do well with the infrared, but the ones I have within 20 feet of the ground do just fine. I have perimeter lighting around my building and that is plenty of illumination to see what is going on, they just go black and white in low light.Hope that helps. For the money they aren't bad camera's.
921490
I can't verify the accuracy except that it matched those of others with whom I've compared mine against. It will read from 0.1 lux to 200,000 lux. I use mine in an Integrated Sphere to measure flashlight output in lumens down to the hundreds of a lumen. It's a great meter!
84605
To have any effect on SAD, the standard is 10,000 lux and that is quite bright! This doesn't give any spec on lux so probably no effect on Seasonal Affective Disorder at all.
1454634
I checked on line to see if I could find out how many lumens and it says 350 lumens. By comparison, a 40W light bulb shines at approximately 400 lumens and 100W at 1500 lumens. So you are getting somewhat less light than you would from a 40W light bulb. Judging by our use, I think 350 lumens is probably pretty much on the mark. We are using it for a bedroom lamp. It works well for reading books with an arm lamp.