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OfflineKrombopulosMichael
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Registered: 01/08/18
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Lighting question: such thing as to much Lux/Lumens?
    #24929514 - 01/20/18 03:32 PM (6 years, 11 months ago)

First time grower here, I’m currently making a SGFC and being extra as f**k by fabing up a custom led light to set on top of the FC.

I’m going to be running some 6000-6500k LEDs and after purchasing I starting doing some research on light intensity for fruiting mushrooms. I found a thread where RR stats you should have a minimum of 2000 Lux per square foot.

So I bought these lights.

After designing the light and laying it out, using the whole 16 ft. LED strip, I found they put out 7500 lumens. Here is what the light is going to look like:



8 aluminum C channels, each housing 2 ft. of the LED strip, placed in between air the exchange holes, covering a 2.6 square foot FC. I have no concern for heat, the LED strip ran slightly warm when I tested them out of the package and even cooler when installed into the aluminum channels.

Now doing the math, 7500 lumens over 2.6 square feet works out to 31,000 Lux/sqft.

After reading a review on the LEDs, a guy said he measured the lumen output of the strip and it was more like 3800 lumens. 3800 lumens over 2.6 square feet works out to 15,700 Lux/sqft. Obviously the Lux drops over the distance of height, but the tub is only 13” tall  and only 9” after perlite, so it can’t be to much.

I’m an extreme hobbiest so I just wanted to make a dope ass light for my FC and use all 8 light rails, 16 ft., of the LED strip. But mushrooms aren’t weed, so why waste nearly 14,000 of unneeded Lux of electricity?

1. Should I kick it down to just 3 light rails, 6 ft. of LED strip, working out to 5,900 Lux/sqft.?

2. Is there a threshold over 2,000 Lux/sqft. that it starts to negatively, or positively, effect fruiting? (Heat generated from the light aside)

I appreciate any feed back, thanks!

For reference, this is the Lux/lumen converter I’m using.

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OfflinehamloafM
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Re: Lighting question: such thing as to much Lux/Lumens? [Re: KrombopulosMichael]
    #24935093 - 01/22/18 10:15 PM (6 years, 11 months ago)

Correct.  Also, kick it down to 3.

There isn't really a threshold.  It's more of a matter of wasting, or not wasting electricity on non-utilizable lux/lumens.


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