My daughters have solitaires with LED drop-ins, but they are 5 and 7 and that was my best option at the time for getting them pink and yellow flashlights for camping, which happened to be the only way that I could keep them from loosing them... When I wanted to get my 20 something sister a light, I got her a 6P with both bulbs, a battery carrier, and made a modified KL3 for long runtimes.
If I had to do it again today, i'd probably get her a Nitecore D10 and a pack of Energizer lithiums. I just don't think you can beat that price/performance
right now. A L1 or E1B would be great too, but force her to order batteries online or get robbed locally to feed it.