CH. XIII] 



CANDLE-POWER OF ARC LAMPS 



FIG. 304. RELATION BETWEEN POWER CONSUMPTION AND CANDLE-POWER. 



A Lamp with right-angle carbons. 



Alternating current with a rheostat gives the least light. 



Alternating current with a transformer gives more light than when a rheostat 



is used. 

 Alternating current with a rectifier gives the greatest amount of light. 



