Leaving the light on in a refrigerator or freezer when not in use for extended periods of time can have several consequences:
Energy wastage: The light in a refrigerator or freezer consumes electricity. Even though it may not draw as much power as the compressor or cooling system, over an extended period, this energy usage can add up and result in unnecessary energy wastage.
Increased electricity bills: As a result of the energy wastage, leaving the light on can contribute to higher electricity bills, especially if the refrigerator or freezer remains unused for a long time.
Potential damage to the light bulb: Continuous operation of the light bulb in an unattended refrigerator or freezer can lead to the premature wear and failure of the bulb. Replacing the light bulb might become an inconvenience and an additional cost.
Minimal impact on temperature: The light bulb's heat output is generally small compared to the cooling capacity of the refrigerator or freezer. However, in some cases, if the light is located near temperature-sensitive items, it could slightly impact their temperature, especially in small or compact models.
Environmental impact: Unnecessary energy consumption contributes to higher greenhouse gas emissions if the electricity comes from fossil fuel-based power plants. This has an adverse effect on the environment and contributes to climate change.
To minimize these consequences, it is advisable to turn off the light in the refrigerator or freezer when it is not in use for extended periods. If you plan to keep the appliance unused for a considerable time, it's also a good idea to unplug it altogether to reduce energy consumption and lower the risk of any potential damage to the light or other components.