HEMONNKAM Book Reading Light, Rechargeable Clip on Booklight, Eye Caring 3 Color Temperatures & 5 Brightness Levels, Night Use for Bed, Long Lasting, Reading at Night in Bed, Mystic Black

I use a clip on light that I attach to the front cover of the magnetic case and find it works quite well. https://a.co/d/06zkkxkW

Clip on light on the magnetic cover https://a.co/d/0hUg9oed Folds up and easily fits in the same pocket as the X4

This one: https://www.amazon.com/dp/B0D1VMTLRW?ref=ppx_pop_mob_ap_share Simple and does the job. $8.