BULB SPECIFICATIONS

The table that follows is arranged by bulb trade number. Manufacturer's specifications for; power consumption, light output and life expectancy are listed. Note that the dual element bulbs have two rows of data, one for the High Intensity element and another for the Low Intensity element.

Under the heading of ?POWER CONSUMPTION ? there are three columns of data; Voltage, Amps, and Watts. Do not confuse this wattage with light output, this wattage is power consumption and is not an indication of bulb brightness.

Under the heading of ?LIGHT OUTPUT? there are two columns of data; Candela and Lumens. Candela is also known as, ?mean spherical candlepower?. Candela and Lumen are directly related to each other, multiply Candela by 12.57 (4pi) to get Lumen. Both denote bulb brightness and can be used to make comparisons between various bulb options.

Under the heading ?LIFE? is the laboratory life expectancy, in hours, for the bulb element at 100% duty cycle. Notice that bright bulbs have short life expectancies, #2357 vs #1157. Also note that P25-2, high element, has the shortest life expectancy while being only slightly brighter then #1157. 

DUAL ELEMENT TAIL ? BRAKE LIGHT BULBS
Used in RUN-N-LITES (except TYPE-3 ? -14), R-TAIL and K-TAIL-2
Bulb # 1157 is standard bulb supplied with kits.
Others are compatible bulbs, shown for comparison.
BULB                   POWER CONSUMPTION       LIGHT OUTPUT         LIFE

                      Voltage  Amps  Watts    Candela     Lumen    Hours
#1157    High Element   12.8   2.10  26.8       32         402     1200

         Low Element    14.0   0.59   8.3        3          38     5000
#2057    High Element   12.8   2.10  26.8       32         402     1200

         Low Element    14.0   0.48   6.7        2          25     5000
#2357    High Element   12.8   2.20  28.2       40         503      400

         Low Element    14.0   0.59   8.3        3          38     5000
P25-2    High Element   13.5   1.86  25.1       35         440      250

(P21/5W) Low Element    13.5   0.44   5.9        2.8        35     1000

SINGLE ELEMENT BRAKE LIGHT BULB
Used in K-TAIL-2 ENHANCEMENT

BULB                  POWER CONSUMPTION          LIGHT OUTPUT      LIFE

                     Voltage Amps  Watts      Candela     Lumen   Hours
#921                  12.8   1.4  17.9          21         264    1000

SINGLE ELEMENT MARKER BULB
Used in TYPE-3 ? -14 RUN-N-LITES

BULB                  POWER CONSUMPTION          LIGHT OUTPUT      LIFE

                     Voltage Amps  Watts      Candela     Lumen    Hours
#168                  14.0   0.35  4.9           3         37.7    1500