3 About the Runway Guard Lights - type 921
TKH Airport Solutions RGL-921 light fixtures are constructed mainly by using standard components from
TKH Airport Solutions standard program of elevated fixtures.
Each light assembly has two LED light fixtures. Each light fixture is a unidirectional, yellow light.
Each light fixture can be individually aligned (see Adjustment on page 19). The light assembly has a
breakable coupling designed for 2” (60 mm) stake mounting (Type C) or with 2” thread stub (Type A).
3.1 Electronics
The driver electronics for the LED modules are identical to the electronics used in TKH Airport Solutions
unidirectional LED light fixture type 792.
The electronics will transfer the RMS value of the 6.6 A series circuit current into the necessary LED current.
The electronics is informed about the LED current needed from the EPROM memory on the LED module.
The electronics also have a built-in facility for flashing the LEDs, and automatically synchronizing to the AC
input when switched on. One of the two light units is programmed to start OFF and the other to start ON, and
the two lights stay synchronized by means of counting the half waves on the power supply. The RGL units
can be ordered with or without activated internal flasher.
3.2 Light Output Performance
Three parameters are essential for the correct light output.
The color of the LED output together with the yellow front glass defines the correct color.
The LED light output together with the lens on each LED defines the correct light distribution.
Installation and Maintenance Instructions - LED AGL Runway Guard Lights - type 921
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TKH Airport Solutions 2022. All rights reserved.
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