I leave ALL flashers standard. I only change playfield inserts with Leds, I rarely change any 44 bulbs above playfield because LEDs in general illumination are too bright n distracting when playing a game and looking for the ball.
I find backbox can use LEDS for general illumination ONLY if u have a backglass and dont want to ruin it with std bulb heat etc. Translite games can keep std bulbs of all types. Std bulbs give a warmer nicer glow which spreads out more than leds in a backbox.
* Std flashers everywhere in the machine are best in my opinion.
* General illumination std is best for me.
* Only inserts to leds is best for me generally.
Std flashers n standard bulbs for general illumination give a wider spread of more light. Leds arent really required for flashers. Led flashers are too expensive and dont bring a huge difference to the table for my liking.
Everything LED is overkill. There is a compromise which works better by using a bit of new and a bit of old.