Here is a link from RQS that I use (and I think many others do too).
How to Use a Lux Meter to Increase Cannabis Yields - RQS Blog
I hope it’s okay to post that….
Anyway, I use a Dr. meter (I think that’s the name), recommended by
@InTheShed a year or two ago. It’s an actual light meter for photography. I think it was $35 USD. If the numbers you are posting aren’t in a Foreign type of numbering system then your light intensity is very low. It’s easy to do That when you aren’t actually measuring it. I usually set the intensity of my light for each stage as recommended in the article. I was thinking today that my Mars Hydro doesn’t seem to be putting out as much light as it should be while set at 100% so I’m going to double check it tomorrow morning when lights go back on. Thanks for letting me chime in!