Thanks once again for the guidance and for elaborating on why too much light can be harmful short of leaf burn.
Quote:
Originally Posted by thefish1337
since you're not noticing any flowering issues I'd say your current conditions are good. burning of leaves from too much photons is at the extreme end of exceeding your plants DLI. pigmentation may not give you the whole story. more light than nessesary increases demand for water, nutrients and co2 to sustain photosynthesis which can make it harder to keep up with your plants and leaves less room for mistakes. why not estimate the par at given heights from the amazon product listing and then use the chart I posted to put your cattleyas in the 10-15 DLI range? maybe they're already right. you know the par your light puts out at various distances and then you can estimate how much DLI your plants are getting from your light cycle. easy peasy
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