Interesing. Too bad that there were no 405 nm diodes back then to compare.
I have tied 3 white LEDs on my door and 2 of them lasted ~ 2 years, then died. The third is still running for 4th year. The current I run them is within the proposed by the manufacturer, no heat generated since they're low power.
Nowadays there are $1 20mW 405nm LDs which could be put to test I've heard that UV causes the green plants to grow faster, probably it's suitable for а greenhouse.
I have tied 3 white LEDs on my door and 2 of them lasted ~ 2 years, then died. The third is still running for 4th year. The current I run them is within the proposed by the manufacturer, no heat generated since they're low power.
Nowadays there are $1 20mW 405nm LDs which could be put to test I've heard that UV causes the green plants to grow faster, probably it's suitable for а greenhouse.
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