ADVANTAGE simpliest and cheapest light source well known techniqueavailability in various designs, voltages and performances
DISADVANTAGElow light output 8 - 18 lm/Wlimited lifetime - approx. 1.000 h for standard bulbssignificantly reduced lifetime in case of vibrations, shock, flashing mode etc.blackening of glass body with increasing lifetime"yellow" lightrelatively high loss of light energy when penetrating coloured lenses
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