Carbon Filament
===============
              current
code volts  min    max

2C    15   .103   .12
2E    20   .09    .12
2F    12   .105   .12
2G    24   .075   .115
2J    24   .018   .033
2K    30   .09    .12
2R    18   .09    .12
2T    40   .034   .046
2U    24   .035   .048
2W    18   .035   .045
2Y    48   .03    .042


Tungsten Filament
=================
A1    24   .033   .045
A2    24   .075   .105
B2    18   .036   .048
C2    36   .032   .044
E1     6   .033   .045
E2     6   .27    .31   (replaces 2H)
E3     6   .12    .16   (replaces 2H)
F1     4   .17    .21   (replaces 2A)
F2     4   .27    .31   (replaces 2B)
G1     8   .085   .10   (replaces 2P)
G2     8   .035   .05
H1    16   .27    .31   (replaces 2D)
J1    10   .23    .27   (replaces 2L)
K1    30   .033   .045
K2    30   .032   .044

51A   10   .035   .045  (for key phones)

Sylvania
48C3 is rated 48V 35mA, 10K hours, 425 end foot candles.