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New to growing your own tomatoes? This is the forum to learn the successful techniques used by seasoned tomato growers. Questions are welcome, too.

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Old March 6, 2014   #1
matilda'skid
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Default fluorescent bulb replacement

I have fluorescent bulbs of all ages. I am not using any that are starting to get black on the ends. How often should the bulbs be replaced. Should I be marking them somehow and discarding them at a certain age. I am assuming they get less efficient. I am not worried about the energy cost but adequate light to the plants.
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Old March 6, 2014   #2
Doug9345
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They typically maintain 85% of their initial output over most of the life of the tube.
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Old March 6, 2014   #3
RJGlew
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Quote:
Originally Posted by matilda'skid View Post
... How often should the bulbs be replaced. Should I be marking them somehow and discarding them at a certain age...
An easy to understand page:

http://www.waynesthisandthat.com/fluorescent.html
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Old March 6, 2014   #4
matilda'skid
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Thanks Doug and RJ Very interesting link. The guy who did the experiment was very organized and followed through on his quest. I am interested in light but haven't taken the time and effort to study it. I have diffraction grating things in my windows that make rainbows and too many stained glass pretties in my windows. I loved a kids science museum where red and green made yellow, but why am I too lazy to find out more. The GE kitchen and bath did well and would be reasonably priced I think. I don't see f bulbs ever marked down at my Wal-Mart.
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