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What Does Chlorophyll need?

What Does Chlorophyll need?

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Concerning absorption due to chlorophyll HPS and LED are rather poor providers of light. Extra red /N coated mercury lamps might be better as they provide some red as well as some violet light. Daylight is at the top with some of the main Fraunhofer solar absorption lines marked. A list of these historical lines and their associated elements follows:

Letter-Element-Wavelength (nm)
A - O2 -759.4
B - O2 -686.7
C - Hα -656.3
D1+2 - Na 589.0-589.6
D3 or d - He -587.7
E - Fe -527.0
b1 - Mg -518.36
b2 - Mg -517.27
b3 - Fe -516.89
b4 - Mg -516.73
F - Hβ -486.1
e - Fe 438.4
G - Hγ -434.05
G - Fe -430.8
G - Ca -430.77
h - Hδ -410.2
H - Ca+ -396.85
K - Ca+ -393.37
L - Fe -382.0

metal-halide-lamps-composite.jpg SodiumSpectraBroadening.jpg SpectraCompsosite.jpg Circadian-vs-LED-Scotopic-P.jpg

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rjluna2
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Robert


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Apr 14, 2018 at 05:32 PM Author: rjluna2
One thing I do understand that these plants do thrives on blue and red absorption. Green tends to reflect due to these leaves

Pretty, please no more Chinese failure.

Lumex120
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Multicolor NE-2s


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Apr 14, 2018 at 11:19 PM Author: Lumex120
Really interesting, thanks for posting.

Any machine is a smoke machine if you operate it wrong enough.

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Adam


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Apr 15, 2018 at 05:01 AM Author: merc
Interesting. HPS works well on my chilli peppers. Maybe it's not the best light source for plants but they liked it during winter and the crop is really good now.
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George Liv Photo


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Apr 15, 2018 at 04:22 PM Author: lights*plus
So I believe now that HPS isn't all that bad, mainly due to a fairly bright line at 498 nm, where chlorophyll is highly absorptive, and due to the deep red. Myself, I have always had pretty good results with a mix of MH and HPS.
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Mainly the electrical side of things


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Aug 25, 2018 at 07:01 PM Author: sox35
I don't think any sort of lamp would make a difference with me, I've got whatever the opposite of a green thumb is, I can kill plants just by looking at them, at least it sometimes seems that way

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