alt Hacker NewsBack of the envelope math:
Solar panel captures energy from an 800nm wide range (300-1100nm)
Plant captures energy from a 300nm wide range (400-700nm)
The solar panel could reproject and amplify the 300nm range at (800/300=) 2.7X more power than the sunReplies
magicalhippo • today at 3:01 AM
But solar panels are only about 30% efficient, so that kinda kills any gains.
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The reason plants capture energy from this range is because that's where most of sunlight's energy is concentrated, which is going to drop this quite a bit further. Glancing at a solar radiation spectrum curve makes it look a lot closer to ~1.5x. Combine that with inefficiencies of both the panel and the LEDs and it really doesn't look that good.