Microclimate B1 ME reptile thermostat. These Microclimate thermostats regulate power output and dim the power source rather than turning it on and off. This method of temperature regulation allows you to use these thermostats with incandescent globes as the dimming prolongs the life of these globes. The night time drop facility allows the thermostat to provide a different temperature to the reptile vivarium during the hours of darkness, this provides a more natural environment for your reptile. The light level can be adjusted to suit room lighting. The Microclimate B1 Magis Eye is a dimming thermostat that gradually varies the power supplied to the heat source for a smooth change in temperature inside the reptile vivarium. These thermostats can be use with all other heat sources also. They control up to 600 watts of any heat source. Fully wired ready to use. The Microclimate B1 ME is one of the most popular thermostats in the Microclimate range.