bulbs of what Intensity?

[guilletto]

Well if you want to see the frog at night; just replace the moonlight with a red bulb of 15 or 25 watts. The higher watt moonlight could reverse your temperature gradient to point where night is warmer than cooler.

But I think red bulb isn't beautiful ...moonlight is so real....In addition, red bulb produces more heat no? And if I bought a 26W moonlight?