The file was designed to be used in a Peterbilt 359 model released by revell (85-2627). They are meant to replace the fake lights on the bumper.However, the design can be used in the following (but not limited). It is meant to use a 3v 3mm LED. It is supposed to be printed in 2 pieces (the top one is transparent, the bottom one should be white/reflective to focus the light).
For any other applications the file/item needs modification, however it was designed with that in mind and allows modifications easily in software like fusion 360.If you require any modifications but do not have the skills necessary don't hesitate to contact me directly.