327 / 387 lamp vs LED
Has anyone replaced 327/387 lamps with the Light Emitting Diode (LED) version in the Master Caution/Warning annunciator panel? I’m interested in something like a King Air, 1900, any aircraft that has a large block of annunciators that use a pair of 327/387 lamps to show status. If you have, is it a do it once like it should be (4,000 hours for a 327 vs 100,000 hours for an LED MTBF rate) or do you end up changing them more often than you would have thought you would?