107 



TABLE 95.— TEMPERATURE AND EFFICIENCY OF SOME TUNGSTEN- 

 FILAMENT LAMPS (concluded) 



Lamp 



Volts 



120 

 120 

 120 



Lamp for type B Kodachrome 



Current 



Sewing machine . . 120 

 Sign (clear) 120 



Photocell exciter. 



10 

 10 



8.5 



8 



4 



Lamp Volts 



Flashlight PR2 2.38 



Flashlight PR3 3.57 



Flashlight 136 1.25 



Flashlight 31 6.15 



Hand lantern 248 2.50 



Flashlight 605 6.15 



Radio Panel No. 44 6.15 



Grain-o-wheat surgical 1.5 



Christmas tree 120 



A 



Rear, instrument bd 6.85 



Step, aux. headlight 13.5 



Dome, panel 6.9 



Signal 6.75 



Dome, panel 13.5 



TABLE 96.— SOME CHARACTERISTICS OF FLUORESCENT CHEMICALS* 



Lamp 

 Phosphor color 



Calcium tungstate blue 



Magnesium tungstate . . . blue-white 



Zinc silicate green 



Calcium halophosphates . . white 



Cadmium silicate yellow-pink 



Cadmium borate pink 



BL phosphor BaSi 2 05 with 



Pb blue ultra 



Calcium phosphate with 



Ce and Mn red 



Data furnished by H. C. Froelich, of Nela Park. 



t 2200 A was lower limit of measurements. 



SMITHSONIAN PHYSICAL TABLES 



