(2)
 The escape slide lights, integrated in the escape slides, consist of a number of 6VDC lamps.

 E. Floor Proximity Lights
 (1)
 The floor-mounted floor-proximity emergency escape-path marking-lights consist of flexible 115VAC light strips installed in a plastic case housing along the aisle.

 (2)
 The wall-mounted emergency exit-markers 90WL1 thru 90WL8, single sided, one for each passenger/crew door and one for each emergency exit, contain a 115VAC luminescent light.

 F. System Control
 (1)
 The EMER EXIT LT switch 4WL on the overhead panel 25VU is a 3-position double-pole toggle switch. It is used to switch the emergency lighting system on (ON position) and off (OFF position). The emergency lighting comes on automatically when the toggle switch is selected to ARM, if the battery busbar power fails. The toggle switch must be pulled to make a selection. This prevents accidental system selection.

 (2)
 The emergency lighting system comes on when the LIGHT EMER pushbutton on the forward attendant panel 120RH is pushed. The pushbutton contains an integral light.

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 (3) The NO SMOKING switch 190RH on the overhead panel 25VU controls the relay 8WL in the relay box 103VU. The relay 8WL switches the exit signs on or off.
 **ON A/C 051-099,
 B. Cabin Emergency Lights
 (1) The cabin emergency lights 20WL, 21WL, 32WL, 33WL and 200WL thru 207WL consist of a housing, a lens and two 6VDC lamps connected in parallel.
 C. Exit Lights
 (1)
 The exit signs consist of a plastic case housing, a lens and a number of 6VDC lamps connected in parallel. There are different types:

 (a)
 The ceiling-mounted exit-location signs 50Wl and 52WL, single-sided, one for the forward and one for the aft passenger/crew doors.

 (b)
 The ceiling-mounted exit-location signs 51WL and 53WL, single-sided, one for each pair of emergency exits.

 (c)
 The exit marking signs 40WL thru 45WL, single-sided, one for each passenger/crew door and one for each pair of emergency exits.

 (2)
 The escape hatch-handle lights 70WL1 thru 70WL4 consist of a plastic case housing, a lens and two 6VDC lamps connected in parallel. One escape hatch-handle light is installed in each emergency exit.

 D. External Lights
 (1)
 The overwing emergency lights 60WL thru 63WL consist of a housing, a lens and one 6VDC lamp.

 (2)
 The escape slide lights, integrated in the escape slides, consist of a number of 6VDC lamps.

 E. Floor Proximity Lights
 (1) The floor-mounted floor-proximity emergency escape-path marking-lights consist of 6VDC lamp modules installed in a plastic case housing along the aisle.
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 (2) The wall-mounted exit-marking signs 90WL1 thru 91WL3, single sided, one for each passenger/crew door and one for each emergency exit, contain two 6VDC lamps.
 F. System Control
 (1)
 The EMER EXIT LT switch 4WL on the overhead panel 25VU is a 3-position double-pole toggle switch. It is used to switch the emergency lighting system on (ON position) and off (OFF position). The emergency lighting comes on automatically when the toggle switch is selected to ARM, if the battery busbar power fails. The toggle switch must be pulled to make a selection. This prevents accidental system selection.

 (2)
 The emergency lighting system comes on when the LIGHT EMER pushbutton switch on the forward attendant panel 120RH is pushed. The pushbutton switch contains an integral light.

 (3)
 The NO SMOKING switch 190RH on the overhead panel 25VU controls the relay 8WL in the relay box 103VU. The relay 8WL switches the exit signs on or off.

 **ON A/C 106-149, 229-299,
 B. Cabin Emergency Lights
 (1) The cabin emergency lights 20WL, 21WL, 32WL, 33WL and 200WL thru 207WL consist of a housing, a lens and a number of LED connected in parallel.
 C. Exit Signs
 (1) The exit signs consist of a plastic case housing, a lens and a number of LED connected in parallel. There are different types:
 (a)
 The ceiling-mounted exit-location signs 50WL and 52WL, single-sided, one for the forward and one for the aft passenger/crew doors.

 (b)
 The ceiling-mounted exit-location signs 51WL and 53WL, single-sided, for the emergency exits.