Concerning the lamp(s) inside this product and spare part lamps sold separately:
These lamps are intended to withstand extreme physical conditions in household appliances, such as temperature, vibration, humidity, or are intended to signal information about the operational status of the appliance. They are not intended to be used in other applications and are not suitable for household room illumination.
An independent digital thermometer that allows you to monitor fridge or freezer temperature to avoid running your appliance too warm or too cold. This wastes electricity and can lead to food spoiling. Your fridge should be kept at between 3°C (37°F) and 5°C (40°F). The ideal freezer temperature is -18°C (0°F)