are these high/low? and how long is the life span?
359827
The 9003 /HB2/H4/ bulbs have both the high and low beam in one bulb. The ZXE Sylvania bulbs outlast the plain old Silver stars by about 25% and I run my headlights day and night, the main thing that you must do is to wear a pair fo Nitrile (rubber surgical gloves) when you handle the bulbs, A single Fingerprint on the surface of the bulb will create a "hotspot" that will cause an premature failure of the bulb this is true for any Halogen style bulb. I usually take a microfiber towel and clean the bulbs with rubbing alcohol before I intall them. The ZXE bulbs are noticeably brighter than the Silverstar bulbs. If you can wait for a sale on them or at least a mail in rebate it all helps.
359828
They are high / low. For me the life span was about 9 months. I dont think I touched the bulb when installing, but maybe I did. Pretty bright and good bulbs, but life wasn't there for me. I got Phillips Crystal Visions now and they are fairly close for less money.My Comparison from stock to These bulbs: http://carphotos3.cardomain.com/images/0015/46/98/15656489_large.jpg?v=1
359829
As others stated, hiigh/low, mine lasted about 9 months before they went out with a week of each other. precautions taken to not touch the bulb during installation.
359830
Yes high & low.Very good to me as far as life span. My other truck unfortunately was totaled (dent in the door). & I bought a newer '97 Toyota Tacoma 5-spd. These easily transferred over to my Tacoma. I have been using them on it for about 3months now? They were on my other truck for about a year. Work great. They are definitely some of the whitest I have ever seen.
359831
I haven't had them installed long enough to comment on life span. My after-market daytime running lights utilize the high beam filament so it's on all the time, no premature failures yet. I do use the high beams as much as possible at night but with traffic everywhere they don't get many hours in a month on high. My Ultras have lasted for 60K and I have both of them in the zXe box as spares. High/Low? Yes, 60 watts high, 55 watts low.
359832
The 9003 /HB2/H4/ bulbs have both the high and low beam in one bulb. The ZXE Sylvania bulbs outlast the plain old Silver stars by about 25% and I run my headlights day and night, the main thing that you must do is to wear a pair fo Nitrile (rubber surgical gloves) when you handle the bulbs, A single Fingerprint on the surface of the bulb will create a "hotspot" that will cause an premature failure of the bulb this is true for any Halogen style bulb. I usually take a microfiber towel and clean the bulbs with rubbing alcohol before I intall them. The ZXE bulbs are noticeably brighter than the Silverstar bulbs. If you can wait for a sale on them or at least a mail in rebate it all helps. The 9003 /HB2/H4/ bulbs have both the high and low beam in one bulb. The ZXE Sylvania bulbs outlast the plain old Silver stars by about 25% and I run my headlights day and night, the main thing that you must do is to wear a pair fo Nitrile (rubber surgical gloves) when you handle the bulbs, A single Fingerprint on the surface of the bulb will create a "hotspot" that will cause an premature failure of the bulb this is true for any Halogen style bulb. I usually take a microfiber towel and clean the bulbs with rubbing alcohol before I intall them. The ZXE bulbs are noticeably... » Read More The 9003 /HB2/H4/ bulbs have both the high and low beam in one bulb. The ZXE Sylvania bulbs outlast the plain old Silver stars by about 25% and I run my headlights day and night, the main thing that you must do is to wear a pair fo Nitrile (rubber surgical gloves) when you handle the bulbs, A single Fingerprint on the surface of the bulb will create a "hotspot" that will cause an premature failure of the bulb this is true for any Halogen style bulb. I usually take a microfiber towel and clean the bulbs with rubbing alcohol before I intall them. The ZXE bulbs are noticeably brighter than the Silverstar bulbs. If you can wait for a sale on them or at least a mail in rebate it all helps. « Show Less
950683
Don't know, I haven't had to replace them. But it's my understanding they last or thousands of hours.
352362
They should be perfectly fine for a very long time. Ive the intact strips running on a 11-14.3 volt system and they work just fine in that range. Ive only had issues with one strip because of a crack in the rubber shell letting water into it
1984982
We have been using about a dozen for 6 months no problems. I would think the would last several years because they are LED. The plants seem to respond well.
455108
I'm not in the position to look at this moment, but I'm guessing they are plastic. My mother has had no problems with their performance. I suggest you contact Amazon and ask... or, contact the seller.
161097
Ours had a typical life span when we purchased. (At our vacation home so I can't provide exact date.)
469591
I'm not sure. I never had a problem with mine. I used mine up already and I don't believe they last as long if they were dated. If they were dated ten years from now, would you want to wait that long to see if they were still good?
703889
Howdy, I have only had my set for about two months and used them maybe six times. The manual says that the product life is roughly six months with daily constant use. So I am sure that six months is the low end on the interval on which these are good to use. In my personal opinion I believe that these will last much longer than six months.
1246827
I don't know how often you use them but I have had some for up to 6 months and haven't any trouble with them. Hope this has been helpful. Thanks Bert
62456
I've owned these for several years now. I won't say these are great, but they did last several years. They just recently died on me. I haven't removed them yet and haven't checked if they're really dead. Yes, these are real UV lights and lights up 'White' colors in your motherboard, and any UV reflective component that you have installed. I have UV reflective SATA cables (neon green), and they give a pretty good 'Ghost' light effect. So, I'm also certain that it would do the same with UV reflective pipes, etc... And since these are 'Black Lights', don't expect it to light up the inside of your CPU. They are not bright. It's not the purpose of this item. I've owned these for several years now. I won't say these are great, but they did last several years. They just recently died on me. I haven't removed them yet and haven't checked if they're really dead. Yes, these are real UV lights and lights up 'White' colors in your motherboard, and any UV reflective component that you have installed. I have UV reflective SATA cables (neon green), and they give a pretty good 'Ghost' light effect. So, I'm also certain that it would do the same with UV reflective pipes, etc... And since these are 'Black Lights', don't expect it to... » Read More I've owned these for several years now. I won't say these are great, but they did last several years. They just recently died on me. I haven't removed them yet and haven't checked if they're really dead. Yes, these are real UV lights and lights up 'White' colors in your motherboard, and any UV reflective component that you have installed. I have UV reflective SATA cables (neon green), and they give a pretty good 'Ghost' light effect. So, I'm also certain that it would do the same with UV reflective pipes, etc... And since these are 'Black Lights', don't expect it to light up the inside of your CPU. They are not bright. It's not the purpose of this item. « Show Less
426403
No, I have not. And so far, I have not had any problems with them lasting for weeks and even several months.
2153122
Yes, they are ageless!! For a small object they present efficiency, compactness and reliability!!
445811
I can't answer that for you, but when I ordered a batch they were fairly recent as in I will get the full lifespan from them.
225347
I am not sure the shelf life all raped up I would not trust to be more then 6 months. I know they don't last longh after you install them even if you don't print anyting.
953543
MIne are lasting quite a long time. Sseveral years and on for as much as 12 hrs per day.
128477
I bought a pair of these in late September. After about 150 miles of running something within them has given way and makes a noticeable rattling on the control (right ear) side.. They still work though, but just bear in mind that they are a consumable that will not last for years on end. Given that they are rechargeable, I figured I'd get about 18-24 solid months out of them, but sadly that may not be the case. I'll use them till they fail or if the rattling becomes overly obnoxious. I've used them in warm temps, freezing temps, light rain and snow and they work just fine. They aren't water/weatherproof, but given the physical breakdown I'll have no qualms against using them out in the elements. I bought a pair of these in late September. After about 150 miles of running something within them has given way and makes a noticeable rattling on the control (right ear) side.. They still work though, but just bear in mind that they are a consumable that will not last for years on end. Given that they are rechargeable, I figured I'd get about 18-24 solid months out of them, but sadly that may not be the case. I'll use them till they fail or if the rattling becomes overly obnoxious. I've used them in warm temps, freezing temps, light rain and snow and they work just fine. They aren't... » Read More I bought a pair of these in late September. After about 150 miles of running something within them has given way and makes a noticeable rattling on the control (right ear) side.. They still work though, but just bear in mind that they are a consumable that will not last for years on end. Given that they are rechargeable, I figured I'd get about 18-24 solid months out of them, but sadly that may not be the case. I'll use them till they fail or if the rattling becomes overly obnoxious. I've used them in warm temps, freezing temps, light rain and snow and they work just fine. They aren't water/weatherproof, but given the physical breakdown I'll have no qualms against using them out in the elements. « Show Less
439042
Hi Donna! Sorry for the delay.....I'm not too sure but I held on to them for at least a couple of months and they worked just great. Still saving some.