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El Natural Diana Walstad's low-maintenance, soil-based 'El Natural' method for keeping plants and fish.

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Old 06-13-2019, 08:51 AM   #11 (permalink)
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Default Re: What am I dealing with here?

What the manual says is "Each press of a corresponding arrow increases/decreases output by 10%". I took that to mean intensity but maybe that's not right. It's gonna take a lot of experimenting. I'll definitely look into the LUX meter. Thanks Hoppy!
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Old 06-13-2019, 04:11 PM   #12 (permalink)
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So. -1 <g>, the question is, after you correct the lighting, then what? IMHO, you should replace the current algae-infested plants with other rooted ones, and see what happens.

Bill
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Old 06-14-2019, 09:53 AM   #13 (permalink)
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Quote:
Originally Posted by hoppycalif View Post
Each click being 10% doesn't really mean that it drops the PAR by 10%. I think it means it drops the electric current by 10%, and that is not necessarily going to drop the intensity by 10%. You can buy a digital lux meter very cheaply, for example: https://www.amazon.com/123CityFarmer...-2-spons&psc=1 With that you can prop your light across a couple of chairs, put the meter sensor at a measured distance from the light, and see what a click does to the intensity. This is not a lux meter that can be used in water, and the spectrum that a lux meter measures is not the full PAR spectrum, but you can divide lux by 70 and have a rough estimate of the PAR. It is a pretty cheap way to get some usable information.
I just realized I have an old Sekonic L-398 light meter that measures in foot candles. Looks like I should be able to convert foot candles to LUX and then to PAR to get a rough idea.
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Old 06-14-2019, 10:11 AM   #14 (permalink)
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Default Re: What am I dealing with here?

Test the light in dry air . These meters aren't water proof.
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Old 06-14-2019, 10:15 AM   #15 (permalink)
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Test the light in dry air . These meters aren't water proof.
Haha! Thanks!
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Old 06-18-2019, 08:24 AM   #16 (permalink)
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The nice acct admin reset my pw and merged the accts so Iím back as GadgetGirl! Hope to be more active.


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