Can a Paph. get "too much" light?

[musicloveranthony]

Hello, thanks for reading.

I have recently purchased a 400watt metal halide lamp. I have the lamp positioned on my northwest window sill so as to supplement the available sunlight. I run it about 10-12 hours a day, right now. It is about 3 feet from my high light plants (Cattleya intergenics, Sophronitis, Aliceara, etc.). My paphs are generally about 4-5 feet from the lamp (give or take a bit). None of my plants have shown any sign of burning, though a couple of my Brassolaelia are showing hints of purple to the leaves.

So, my question is: Can a Paph get too much light? If they aren't burning and aren't warm to the touch, is it safe to assume they're doing alright?

If it matters, I am growing a bit of everything: parvisepalum x cochlopetalum, parvisepalum x polyantha, brachypetalum x polyantha, brachypetalum x cochlopetalum, polyantha x cochlopetalum, cochlopetalum x cochlopetalum and some random maudiae type hybrids