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← Guides and resourcesControl-method guide

Dimming, on/off or pulse?
Match the behaviour to the heater.

The plugs may look the same, but the way a thermostat controls power changes how the heater behaves. Start there before comparing brands.

Australia-firstReviewed 30 September 2026No universal winner
01 · DIMMING

Reduces output gradually.

Usually the first method to compare for a compatible visible basking lamp because it adjusts output rather than repeatedly switching the light fully off and on.

Check:

The lamp must be dimmable, the wattage must be supported and the probe must be fixed securely.

02 · ON/OFF

Switches full power around a set point.

Simple switching can suit compatible mats, cables and some non-light-emitting heaters. Temperature swing depends on the differential and system inertia.

Check:

It is not our first comparison for a visible basking lamp, and frequent switching may be undesirable for some equipment.

03 · PULSE

Sends power in controlled pulses.

Often compared for compatible ceramic heaters or other non-light-emitting sources where proportional control is useful without a visible lamp flickering.

Check:

Never assume a heater supports pulse control merely because the plugs fit.

A five-minute decision tree

Ask these questions in order.

  1. Does the heat source emit visible light?
  2. Which control methods does its manufacturer allow?
  3. What is its maximum wattage and start-up behaviour?
  4. Where can the probe be secured and independently verified?
  5. What happens if the probe moves or the room temperature changes?
Quick answers

Questions worth asking before checkout.

Is dimming always better than on/off?

No. Dimming is particularly useful for compatible visible heat lamps, while switching or pulse control can suit other compatible non-light-emitting heaters. The correct answer depends on the heater and its instructions.

Can pulse proportional control run a light-emitting bulb?

Rapid power pulses can create visible flicker and may not be an appropriate control method for a light-emitting heater. Use the control method specified for the heater and thermostat.

Can one thermostat control two enclosures?

Only where the manufacturer permits it and the combined load, probe logic and failure consequences are properly understood. One probe cannot represent two independently changing enclosures.

Sources & further reading

Check the instructions, not just the shopping page.

Reptile One EziStat product sheet ↗Exo Terra thermostat information ↗Eco Tech Australian product information ↗Australian specialist thermostat range ↗

Product ranges, stock and specifications change. Reviewed 30 September 2026; confirm the current manufacturer instructions and Australian seller details before purchase.