Making Your Own Lights
You may not be able to find the right off the shelf lighting to meet the needs of your project, so here are some sources on making your own lights.
Note that these need at least a basic knowledge of electricity and electronics, techniques such as soldering etc. Also, if used for more than home DIY projects, remember that you need to be able to show they meet UKCA/CE requirements.
Building DIY LED Lights
Making tube lights with LED strips
Making flexible LED panels