Depending on the machines lighting system, software, and era, regular white or colored standard bulbs may be good choice for home use. I say, enjoy your inexpensive incandescent bulbs and their unique properties. Buy a whole box for a dollar.
LEDs are purely optional modifications for a pinball machine.
Beware of shunning the rituals of the modification cult here on The "Modside". It is the culture of "The Modside Evangelistic Association" (TMEA) to bash unbelievers who shun modding ie LEDs. Modders crave every mod. They celebrate and defend every mod purchase and installation as though their personal reputation depended on it. It does matter here. Why? Because, pretty pictures of a heavily modded pinball machine posted are the way TMEA members get accepted and progress to higher levels of the TMEA cult. Nobody posts pictures of a stock machine, unless they are selling it or just purchased it. That just wouldn't be cool here given the above.