Rechargeable Battery Operated Light Bulb with Remote Control 2 Packs, 350 LM (Tiendamia listing)
Battery: 2000 mAh, Type‑C charging.
Tiendamia
15 selectable colors (RGB + white modes) + 10 brightness levels (10% to 100%) via remote.
Tiendamia
3 timer options: 30 min, 60 min, 120 min.
Tiendamia
Two installation ways: screw into standard base (E26) or use magnetic / adhesive mount (removable base) for non‑wiring applications.
Tiendamia
A local Sri Lankan listing with similar functionality:
Rechargeable Light Bulb with Remote Control Dim & RGB, Timer, E27 Base
Uses E27 base (so fits many lamp sockets).
Daraz
Functions as “backup emergency” light when mains power is off.
Daraz
Also seen:
Neporal MAGICPRO Rechargeable Light Bulbs with Remote
3 color temps + 6 RGB color shift, dimmable.
Battery life claims: full charge supports 4–50 hours depending on usage mode.
These listings show that the product idea you described is already on the market in some form.re or socket type.
