Hi Beman. So I have a Reptile Systems Eco T5 Zone 2 UVB(German made). At 20cm with the reflector in low power output, it generates a UVB of 3.8. That’s without the 70% screen penetration rule. Currently the bulb is 15-17cm away from his back.
Based on Petr Něcas findings I only have a misting...