The True Cost of Kerosene Light: Cost per Lumen-Hour, Cost per Useful Lumen-Hour at the Desk, and an Evening Exposure Bound

Prices kerosene light per lumen-hour and per useful lumen-hour at a desk for simple wick, hurricane and pressurised lamps, compares an LED lantern (29.54x cheaper per lumen-hour, 98.58x per useful lumen-hour at $1/L), and bounds evening PM2.5/CO exposure in a 30 m3 room model against WHO guidelines. Health dose is reported separately, not monetised.