Is the question whether they already come with trits installed, or if they have places to put trits?
If the latter, you can also look into accessories for whichever lights you already own, or are planning to buy. There's things like a new bezel with cuts for trits in it, same goes for the tailcap.
The styling of some flashlights can also lend itself to adding standard size trits. My NiteCore Extreme for example has 6 holes drilled in the tailcap region which happen to almost perfectly fit 1.5x5mm trits (don't know if that was done on purpose or not, but it works for me).