How long do these last?
1706901
Not sure if I can answer you as I have used several continuously for more than a year with no problems.
1706902
I've had them for only 3 months, they are on plants with a full South facing window and don't show any deteriation so far.
1706903
Do you mean how long they work? I've had them since April. I noticed the soil got dry on a couple of plants and refilled the spikes (rather than the tubing) as they were dry (they're normally filled with water). It seemed to fix the problem. If you mean how long it will water the plant I'm going away for 3 weeks and am not worried. I use a gallons of water for 2-3 spikes and it takes weeks/months to empty. I think it depends on what type of plant you have on how much water it uses.
1590514
It really depends on how much you use them but I can say that i use them for around 2-3 hours a day and with that frequency they last about a month.
683127
They last a normal length of time. Do not recall how many hours. More importantly is that the light is not very strong. Depends what you need them for but they do not illuminate very much.
2046117
They seem to last a long time, I bought the 4-pack two months ago and I'm still using the first one. I really don't use them a lot, tho, only when I open up my pc case.
741169
Not sure exactly, but I rarely replace them, I would say over six months at the very least
71929
If kept in a cool, humid free area they can last for years. If I remember correctly I'm thinking 10 years +/- a year or two.
703888
I've only had mine for a month or so. However, I'm certain it depends on how often you use them and how well you take care of them after and between each use. I expect mine will last longer than 6 mo. as I don't wear them constantly.
2259949
At least a few months. I use them too quickly to find out, but I used a leftover box after about three months and they were good as new.
372036
I have used these for about 4 years. They have been lasting close to 1.5 years. I have had no problems.
359800
They last a pretty long time...depends a lot on how much you use them and how many layers of fabric you cut at one time.
540335
They're good for about three years. They only last about a week so that's plenty of time.
1498360
They are made of plastic so they will probably last quite a while. You just have to clean them up every so often.
76930
I've had them and use for over 6 months and they still operate. How long they will continue to work is anyone's guess.
1853087
They usually can last a year.....but I personally notice a difference after 6 months.
857952
They can last for years. I uploaded a video of mine after a few years of use, and I use them often: http://www.amazon.com/review/R236EXQTVCUJA4
210197
I've been using them for around a year and the average pair lasts me 10-12 days of daily use. They don't lose their 'memory' foam capacity for a month or more and resist ear wax absorption quite well.
999082
They last for like a year. The expiration date is on the top it is show as "year-month"