I posted up some advice about using LEDs in this thread on MAACA, so I thought I should repost it here...
Hi! I have put LEDs in a handful of EMs so far, all to great success.
You are looking for #44s/Bayonet base (they rotate, so NOT the 555s)
I order all of my lights from http://cometpinball.com/ and am very happy with their prices, products, and ability to ship things with no duty getting charged.
above the playfield I use almost all white lights. My rule is: if the
bulb can be seen while playing, I use frosted "warm white". If the
bulb is not directly visible, I use frosted "Natural white" (which are
Often the only coloured LEDs I use above the playfield are to match the rollover guide plastics at the top.
Under the playfield, I will match the inserts with frosted or non-frosted coloured LEDs for purple, red, green, blue inserts.
Yellow inserts, I use natural white bulbs since the yellow LEDs are often too dim.
the inserts are clear, but the surrounding paint is yellow, I'll
sometimes use non-frosted yellow LEDs under them since the white inserts
allow the colour through better.
ALWAYS get flat-top lights when
possible. Dome-top lights leave a circle of light on the plastic they
are beneath. There are some uses for dome-tops, but few on EMs.
first priority is replacing all incandescents in the backbox so they
stop cooking the backglass! You can often find creative colour accents
to use, but 80% of the time warm white and natural whites (frosted,
almost always) are the way to go.
I colour-match with the "game over", and player # lights. And I use natural white for the score reel lighting.
I almost never bother putting LEDs in the match lights though.