Artificial Light – notes

until 2:28: bonfire/oillamp/candle/torch

until 8.50: carbon arc/incandescent bulb/Swan-Edison/gas with Auer Mantle

until 11.40: tungsten bulb/halogen/decor

until 22.24(or to end): fluorescent tubes/Geissler & Crookes tubes/ neon light, sodium…/spectrum etc