An acetylene gas powered lamp produces a surprisingly bright, broad light.

These lamps can produce much better quality light without resorting to phosphors.

For example, a 100-watt, 120-volt lamp will produce about 17.1 lumens per watt.

These lamps produce light by sending electricity through a ionized gas.

These lamps produce light across a broad spectrum with several strong peaks in the ultraviolet range.

After 12 hours a 1917-era miner's lamp produced less than one candlepower and about 2 to 5 total lumens.

He neglected to complete the equation: the existing 400-watt sodium lamps produce 50,000 lumens.

Each lamp produces a lot of heat, thence, each star has to be cooled off every now and then.

These lamps have produced interesting illumination effects in theatre and dancing.

At 50% of the explosion energy, the lamp may produce several thousand flashes before exploding.