How much does it cost to run a gas outdoor lamp?

The cost to run a gas outdoor lamp primarily depends on the price of the gas (propane or natural gas) and the lamp's consumption rate. On average, a gas outdoor lamp may consume about 1 to 2 gallons of propane per month, leading to costs ranging from $10 to $30 monthly, depending on gas prices. Additionally, maintenance and initial installation costs should be considered for a complete assessment.