A Casper light box. This was printed with Luminous Green filament for the white filament and a black light led strip was used. This causes the filament to glow green when on. There are two knockouts on the light box for running leds. One on the back cover and another on the lower right of the light box. The tabs can be easily cut with a utility knife. The knock out is 5 x 15.5 mm and will accomidate this connector from amazon:( https://www.amazon.com/gp/product/B0CFWZXHPH/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&th=1 )