Torch lamp outside

[Kaiser09]

Does torch lamp consume faster when outside/raining? I don't know why but I am noticing now this thing after years of gameplay.

[Ark]

Yes.
<fuelConsumptionPerTickInRain>0.0006</fuelConsumptionPerTickInRain>
A torch should consume extra 1.5 units of wood per hour in the rain.
The same goes for campfires, build a roof.