Spring has come, and with it the idea of collecting something for the older generation for dacha seedlings.
At first I thought of limiting myself to a ready-made phytolamp with Avito, but after reading local publications one , two and three authored by @ iva2000 and @Fenyx_dml, I decided to repeat the calculations and figure out what you can do with your own hands. For maximum simplicity, I decided to use 4000K LED bulbs in the E27 cartridge from Leroy :
Luminous flux of one lamp: |
900 lm |
Power of one lamp: |
10 watts |
Color rendering: |
80 Ra |
Color temperature: |
4000 K |
We choose the unit cell area, which our lamp to light the way to light density per m 2 was not less than 300 eff.mkmol / s / m 2 .
To do this, we first use the formula from this publication and calculate the energy value of the light of one llama (YPF):
η - luminous efficiency, Lm / W
η = Luminous flux of one lamp / Power of one lamp = 900/10 = 90 lm / W.
Ra - general color rendering index = 80
CCT - correlated color temperature in degrees Kelvin or, as they write in Leroy, "Color temperature (in K)" = 4000 K
We substitute everything into the formula:
The energy value of the light of one lamp (YPF) = 1.134 eff.μmol / J.
Further, as in the publication, we multiply YPF by the power: 1.134 * 10 = 11.34 eff.kmol / s.
Now let's calculate for which area the illumination density per 1 m 2 will be at least 300 eff.mol / s / m 2 :
11.34 / 300 = 0.0378 m 2
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