Comment to How to use a light meter?
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I never worried about that when I used hps. The heat was always a concern. I replaced my bulbs once a year.
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I use the LUX meter with the HPS & MH bulbs and replace the bulbs when the lux starts to diminish at a set distance out and I use a infrared temp gage for the canopy and that helps me decide if the bulbs are dying or not.
By this summers end I will probably make the switch to LED's though.
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i replace mine ever 6 months ..... i hope 2 go led this summer .... do u have 1 in mind i like hlg i have one in veg now ...
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