Show cheap fila filament ent lamps general the german general electric society now manufactures metallic filament lamps to be run at the low tension ot of 14 volts giving lights of 10 16 and 25 candle power they cost about half the price of metallic filament lamps made for tensions of and volts and are said to be very durable their alimentation Is rendered possible by means of transformers which reduce the tension with high tension the filaments have to to be long and thin but those used with low tension are shorter thicker and cheaper it is asserted that the light yield of a lamp Is increased when used at low tension |