Here are some simple tea-light holders, designed on Tinkercad.
Produced using transparent or natural PLA, with no infill.
With a cheap set of battery operated tea-lights they work a treat.
If you want the number version, please see https://www.thingiverse.com/thing:2801634
If you change the size of the letter, remember you may have to adjust the size of the tea-light holder.
If you enjoy them, please click on like.