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Halogen bulbs are filled with iodine or bromine gas, which prolongs the filament's life by reducing tungsten evaporation. A standard halogen bulb lasts about 3,000 hours at 25 lumens-per-watt
since with passing of time due to heat resitance of incandescent lamps varies so the plot of v versus i will not be linear it willl nonlinear
Lava Lamps Lava Lamps
There are 3 darks lamps that people use as light when they do it HARD
Over 5,000 years ago lamps were invented. The Egyptians had oil lamps.
Meat
electrons