Yes, it was in reference to moonlight, and technically they were talking about cold cathode lighting, which looks like neon lighting, but actually uses less power, and the bulbs don't really give off heat.
Problem is that they are pretty darn bright compared to the LED
's that most use for moonlighting...and unlike an LED
you can't really dim a cold cathode...it'll dim a minute amount, then just go black.
But, people have successfully put them in the hood so that they don't shine into the water...rather they shine into the hood and get diffused to make a much dimmer light that reflects back into the tank.
Still, I think LED
's are the better option.