I needed 6 of these 12" fluorescent bulbs for some very old (about 20 years old) but very little used fixtures. Bulb prices range from $2 for a cheap bulb up to $9 for a premium bulb from Philips or GE so I went with those $4 mid range bulbs (but restarts after a few seconds) and these new bulbs don't light they keep coming on even worse than those old bulbs. So I take out the new bulbs and install two new T5 starters and put the new bulbs back in. Same, the lights don't come on, they keep restarting. No improvements. So I go to another unit over that works fine the old bulbs stay lit and stay on all the time put in old bulbs and two new ones y keep restarting i have the old bi installed and everything is fine. These pears are NOT GOOD.
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