Testing

Find the Right Distance

Select your animal’s Ferguson Zone, enter screen blockage, and choose a bulb — we’ll calculate the correct placement distance for safe, effective UVB and heat.

1 Ferguson Zone

2 Screen / Mesh Blockage

%

A 50% blocking screen halves effective UVI at any distance — move the lamp closer or choose a higher-output bulb. Heat/NIR is less affected by mesh than UV.

3 Bulb Selection

Complete steps 1–3 above to see your recommended placement distance.

Data sourced from the Reptile Lighting Guide V10 (Muryn, Baines & Dishman, 2025) and lamp iso-irradiance maps (Tomaskas Ltd / Frances M Baines, 2020–2024).

Always verify with a calibrated UVI meter (Solarmeter 6.5) and power density meter (RS PRO ISM400).