can you have too much light

[aclum]

Hi,

Maybe this isn't quite what you're looking for but you might find it of interest...

A few months ago when I was trying to learn more about LED grow lights, I ran across this website:

http://www.weedfarmer.com/cannabis/lighting_guide.php

It has lots of info on lighting, including the output of specific types of lights, but the notable portion is the following where they mention how a plant getting too much light can experience "solarization" that retards growth.

An excerpt
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Light Requirements of "High Energy" Plants
1000 - 5000 lux Min. necessary for life
10000 - 15000 lux Min. necessary for consistent but sparse growth
20000 - 25000 lux Min. necessary for robust growth
25000 - 30000 lux Max. Efficiency for Sub Tropical varieties
25000 - 50000 lux Max. Efficiency for Equatorial varieties

Plants need 25000-50000 lux too grow fast.

90000 lux Max. Sunlight Intensity on Earth's surface This is too much light, it is not good for the plant. Plants subject to intensities at this level or greater are at risk of "solarization," whereby photosynthesis is retarded. This can happen at noon on a clear Tropical summer day, especially at high altitudes.
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(Bolding of text mine)

I haven't done much research but I haven't come across any more info on the plant "solarization." (Not at all related to soil "solarization" but more akin, in a way, to photographic "solarization" in some undefined, intuitive way ).

FWIW,
Anne