How close and for how long each day do you have to sit? How often do the bulbs need replacing?
741496
The instructions should give pretty specific details. I believe it's 12 inches for fifteen minutes but you may have to toy with it. I found that recommendation to be a bit much so i put it further away. The bulbs will last a very long time. I've had mine for over a year and haven't replaced one.
741497
I keep it on in the mornings while at work. If it is dark outside, I immediately turn it on. You only need 30 min per day. I keep it about 3 feet away from me in the corner of my eye. It doesn't interfere with my vision at all. The bulbs are fluorescent, and I'm on my second season now with it. It really and truly does work, will give you more energy waking up and knock the blues away through the day. Warning! Don't use it at night as it may keep you awake.
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.
741499
I use it above my computer screen on my desk. Desk monitor distance from me and it's a great desk light as well as SAAD device. Works great. Have had it for two years. No bulb burnout this far. Get in about 30-45 minutes 3 times a week. Far better than cap based devices which give me a glare headache. Light has two intensity settings.
741500
The information about how long to use it each day must be in the packaging. This is a medical device. There is a prescription of X number a minutes at x distance. Yes, you can increase the distance-to a point. If the information is not in your packaging then I question that this is actually a light therapy lamp. At too great a distance it is no longer a therapy lamp - just a nice lamp. Most doctors refer their patients to Northern Lights Technologies.
741501
Mine is a couple of feet away from me and a little above. I have had mine almost 2 years no need to replace bulbs yet.
1765296
I have 12 fixtures with this bulb. Some are on continuously and last about two years. Some are on intermittently and last about 3 or 4 years.
1726173
As Del answered I've not used them on a regular basis, but I have had the bulbs for 4 years and use them around the holidays. They seem to last for quite a while.
995488
There are 12 equally spaced LED bulbs or chips or whatever they are. I don't think they are replacable, but I don't think it matters. LED bulbs last tens of thousands of hours. If you only use it a couple of hours a day, this lamp will outlast all of us.
1645621
It is my understanding that these bulbs are not replaceable. I would call Lithonia tech support and asked them. Also, take a picture and go back to who sold it to you and see if they can help. It is also my understanding that they are supposed to last for 30,000 hours which is about 8 years at 10 hours per day.
1728399
I still have the 10k bulbs that came with it, and 2 zoo med plant bulbs. I've heard that you should replace them every 6 months, and recently noticed that one of my bulbs is getting quite dim. I'm going to personally replace two at a time when they start to go out.
55436
Bulbs can be replaced, not sure what # they are. You'll know when you remove the old ones...
889725
50,000 hours.... WELL WORTH IT as your plants will love it far beyond just a hid or t-5 etc (I would NOT use it alone unless your doing one plant...) And NO you can not change bulbs etc.. when its done its done... Its a TRADE OFF off being able to replace a bulb for BETTER growth! LEDS RULE YOU WILL never want to go back when you use it! I wont! I am already looking into a BIG ONE ie a REAL DEAL non ufo (PRICEY ONE) leds work that good!THAT GOOD...
1817302
That depends on which bulb burns out. But an LED bulb lasts thousands of hours.
208204
id be careful with the bulbs. their cheap Mine lasted maybe a month. id suggest getting a pair of Sylvania silverstars
1431215
there are no replacement bulbs. these are LED's and they should last over 30,000 hrs. if it died in it could be a electrical problem. I would contact Daylight.
1166061
Depends how often you use it. Mine lasted seven years and this is a pack of ten bulbs. You'll never use them all!
569943
If you expand the Product Description, you'll clearly see the following: Substantially longer lifespan (a minimum of 22.8 years at three hours a day of usage) Note: The bulbs are not replaceable, but 22.8 years is a very long time, and most will last much longer.
101100
The 30,000 hours is actually projected to be 18.26 years based on average use of 3 hours/day. I am guessing the company is relatively new and has not been around for 30 plus years like Phillips or GE to offer a lifetime or 20 year warranty so they are being conservative/realistic with what they can honor. Again, just pure conjecture. I have had the bulbs for 6 months and they still work fine.
297990
LED bulbs are supposed to last up to 30 years, and integral into the circuit board. To my knowledge they cannot be replaced. I installed 6 of these and they look great!
477522
I have heard the bulb will last about 2 years on the average before it has to be replaced. There is also a silver probe that must be replaced when it goes bad. A light will turn on when you have to replace that. I think that may be about 2 years as well. Of course, it depends if you are doing 3 loads per day or 1 load per week.
1943586
The bulbs are rated for 8,000 hours, but the intensity does degrade over the bulb life. Therefore, you should replace the bulbs every two years, based on your usage, to maintain the same lux rating. However, even though the lux level drops over time, you may also simply increase the treatment time to derive the same therapeutic benefit (e.g. 10,000 lux for 30 minutes, 9,000 lux for 35 minutes). The bulbs retail for arounf $10 each and the Sky uses 2, which may be ordered from Carex directly or from other dealers.