Ill 



TABLE 101.— PHYSICAL AND ELECTRICAL CHARACTERISTICS OF FLASHTUBES 

 AND FLASHLAMPS DESIGNED PRIMARILY FOR PHOTOGRAPHIC APPLICATIONS 



Approx. helical n? S . Jj c--^ J-.2-* ,°.2-* 



* .n source dimen. — "3 5 3 ilc5 :> 'E«i;'e« | i' 



« 3 $ ;- u Jo m u»j Sg eo a; g ££tij« 512 -° 512- 



FT-210.. T-10 IF Octal 3-Pin li" If" 2,000 200 7,000 25.0 300 200 



FT-214.. T-12i Giant 5-Pin U If 2,000 200 7,000 25.0 300 200 



FT-220.. PAR-46 3-Scr. Term. U If 2,000 200 7,000 25.0 300 200 



FT-403 . . T-18 IF Large 3-Pin 1J 2\ 2,000 480 18,000 45.0 475 350 



FT-503 . . T-18 IF Large 3-Pin If 2\ 4,000 2,000 1 100,000 150.0 700 550 



Maximum 



Flash- Bulb energy input Light duration Peak 



lamps % diameter Base watt-sec. Volts milli-sec lumens 



5804X H" 4 Pin 100 2250-2850 .09- .19 40 million 



48U4X 2i 4 Pin 600 " " .27- .7 62 



68N9T- li 5 Pin 200 900-1000 .3 -1.2 30 



88P9M li 5 Pin 300 2000-2500 .12- .6 45 



1TZ Special 1000 2000-2850 2. -4. 35 



* Data furnished by L. R. Benjamin, General Electric Co., Nela Park, Cleveland, Ohio. t With approxi- 



mately 0.5 millihenry of inductance in series with each 100 microfarads of capacity. \ Data taken from 



circular of Amglo Corporation, Chicago, 111. 



TABLE 102.— COLOR OF LIGHT EMITTED BY VARIOUS SOURCES 



Color, 

 percent 



Source white Hue 



Sunlight 100 — 



Average clear sky 60 472 



Standard candle 13 593 



Hefner lamp 14 593 



Pentane lamp 15 592 



Tungsten glow lamp, 1.25 wpc. 35 588 



Carbon glow lamp, 3.8 wpc... 25 592 



Nernst glower, 1.50 wpc 31 587 



N-filled tungsten, 1.00 wpc 34 586 



Color, 

 percent 



Source white Hue 



N-filled tungsten, .50 wpc 45 584 



N-filled tungsten, .35 wpc 53 584 



Mercury vapor arc 70 490 



Helium tube 32 598 



Neon tube 6 605 



Crater of carbon arc, 1.8 amp. . 59 585 



Crater of carbon arc, 3.2 amp.. 62 585 



Crater of carbon arc, 5.0 amp. . 67 583 



Acetylene flame (flat) 36 586 



SMITHSONIAN PHYSICAL TABLES 



