Where can a picture be installed in a battery-powered light box?

Question

Batteries

Good afternoon!
The task is to install a picture in a light box (lightbox), the LEDs in which will work on batteries. Here are examples of the desired result.
https://rulight.ru/product/svetovaja-kartina-kanun...
https://www.lights-market.ru/articles_175-krasochn...
Where exactly and how can such work be done? All lightbox manufacturers refused to work with such an order, as they cannot provide battery-powered lighting. Are there any other workshops or companies that work with this?
Thank you very much!

Answer 1

Commercially available LED strips and power controllers will drain your batteries in batches in a short time, and developing a single solution in 1 copy is usually not of commercial interest. Well, you won't like the price tag.
Order the manufacture of a lightbox without backlight and assemble your circuit on LEDs - this is the easiest option.

Answer 2

A battery-powered lightbox will require batteries to be replaced almost every hour.
Forget about batteries and think over the classic version with a power supply.