Need a lux reading for coralife t5ho fixtures!!!!! - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 08-14-2012, 02:46 AM Thread Starter
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Need a lux reading for coralife t5ho fixtures!!!!!

Need a lux reading for coralife t5ho fixtures!!!!!

If you have a lux meter can you help out the community by giving us a reading under the coralife 24watt t5ho dual fixtures
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post #2 of 4 (permalink) Old 08-14-2012, 03:15 AM
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Hi Stinkmonky,

I think the reason you are not getting responses is most of us now use PAR meters rather than Lux meters for measuring light intensity because PAR is more relevant to the spectrum we use for plants.

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post #3 of 4 (permalink) Old 08-14-2012, 09:33 AM Thread Starter
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i'm aware but i understand that par meters are a couple hundred dollars compared to a 10-20$ lux meter. i'd assume more people would have a lux meter instead of a par
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post #4 of 4 (permalink) Old 08-14-2012, 06:52 PM
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You can use a lux meter, with the light sitting across a couple of chairs, to measure the intensity versus distance from the light. Then divide the lux readings by 61 and you have an accurate enough measure of the PAR produced at that distance. This will work for T5, T8, LEDs, as long as they are in the 5000-10000K color temperature range. We don't need any more accuracy than this for deciding how to use a light or whether to use it. And, it is very much cheaper - as low as $10 for a Mastech lux meter.

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