Quality of LED's these days is phenomenal so I tend to use them a lot. The choice is amazing.
I choose Pinball centre NO-FLIX as they are very close to warm frosted, which I use for all GI purposes white and they have very little or no ghosting.
In saying this I do use incandescent on the GI in EM machines as I like the look, but inserts I use LED.
Pretty much ALL manufacturers are fitting LED's as standard now.