Comment to 'How to use a light meter?'
  • 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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