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How to use a light meter?

What should be lux during the growth and flowering period. I use hps and mh bulbs.Help me please.

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Replies (4)
    • Morning, I follow this pretty closely from GWE

      https://www.growweedeasy.com/lux-meter

      if you haven't bought a light meter and you have an Iphone I suggest getting the Photone app. Its cheaper and more accurate.

      https://apps.apple.com/app/photone-grow-light-meter/id1450079523

       

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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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