the poem is called the death bed and its by Siegfried Sassoon
Incandescent Lamps Light Emitting Diode Neon Lamps Fluorescent Tubes Compact Fluorescent Lamps Halogen Lamps Metal Halide Lamps High Intensity Discharge Lamps Low Pressure Sodium Lamps High Pressure Sodium Lamps
LED lamps
Fire in various forms. Candles, oil lamps, gas lamps, etc.
For light.
By far the new LED lamps have a longer lifetime than incandescent lamps.
Ultraviolet light
There are 3 darks lamps that people use as light when they do it HARD
light
Candles. kerosine lamps, gas lamps were popular in cities
a light bulb
Lava lamps !!!
it has power