Orchidarium lighting

[clusty]

Hello,

I am on the brink of putting the final touches on my brand new orchidarium and was wondering about the light strength:

So far, my lamps produce 40k Lumen (8 T5 tubes ), with a ground floor surface of 12.5 feet ( 30 inch high ).
Assuming no losses, this comes to about 3.5k Foot/candles according to my calculations.

I cannot measure accurately how much are they really getting.
Would you think I will be frying my lower light plants with such intensities?