Paul,
Thanks for the reply. Sure never thought when I threw this question out that it would ellicit so many responses.
The most important thing to remember is that the failure of a device, such as a burned out bulb or a flasher that fails to flash, CANNOT cause a less restrictive aspect to be displayed. For instance a yellow over green whan the yellow burns out would display a clear instead of an approach medium. A light out relay is installed (by law) to transfer the yellow aspect to the bottom unit to give a less restrictive approach aspect.
And I thought this was a simple question when I put it out on the forum! All these responses and the effects of a burned out bulb or flasher never came up. I don’t think anyone even thought of it until now. I know I didn’t.
Thanks, I think.