Ratio of Brightness

Class.	Power Consumption [W]	Color Temperature [K]	Color Rendering [Ra]	Ratio of brightness felt given the same illuminance [%]		Ratio of illuminance required for the same brightness [%]
				Monochrome Letters	Object	Monochrome Letters	Object
High Pressure Sodium	100	2,100	29	63	66	160	152
Metal Halide	100	3,700	80	71	80	141	125
MaximaLight	100	5,500	80	100	100	100	100