Testing of Masked Lamps in Taxiway Edge Lights

Technical tests were performed to investigate the use of masked lamps in taxiway edge lights. These lamps were tested to determine if there were advantages in their use over the ones now being used.

The masked lamps were superior for use on the straight portions of the taxiway and on curves where at least three lamps were visible. They were also superior in that they reduced off-taxiway light to a minimum.