For greenhouse, the sunshine can get into the glass and its spectrum range is wide. So we just need to use 450nm and 660nm as fill in lighting.The spectrums of upper row are for growth stages of seedling,vegetative and flowering respectively.
If moisture enters and the lead-in contact is poor, the light may not turn on. If you look carefully, you can see that there is a layer of waterproof rubber pad on it, so that when the cover is tightly closed, it can have a good waterproof effect.
Moisture will cause the solder paste to oxidize within one or two years, which will cause the LED to fail bright. Therefore, special glue is required to block the gap between the LED and the PCB.
The humidity in the plant growing environment is very high, RH is about 85%. If water vapor enters into the LED, it will change the color of the silver-plated layer, which will affect the light emitted by the LED and reduce the brightness.
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