Originally Posted by coolidge
Is there an alternative bulb we can use? Currently a EYE R50W Mercury Vapor.
Seems like alternatives are a popular idea. . .
The obstacle to replacement/upgrade/whole-new-system may be the good-money-after-bad dilemma. . .
". . .sunk costs should not affect the rational decision maker's best choice. . ."
With no definite failure point this replacement decision gets a little iffy:
"Mercury vapor lamps rarely burn out completely but suffer from lumen depreciation. The lamp produces 50% less light every five years, to the point of becoming ineffective while still drawing the same amount of power it drew when it was new. This comes about because the Emitter is Deposited as a Dark Film Darkening the Arctube Wall and Reducing Light Output."