Your search for "ultra small led" revealed the following:

Japanese lantern A red, skewer friend, oden etc.: Sakatsuo Kit HO(1:87) 1508

LED module with magnetic switch with lead wire : Yellow : BitTradeOne Electronic Parts Non-scale ADMGLWYE

Lighting 5 (Five), light bulb colour, with mounting base: Sakatsuo Electronic parts 2911

Polyurethane copper wire (clear coating) Diameter 0.1mm Length 10m : Sakatsu Material Non-scale 4509

LED module with magnetic switch : Warm white : BitTradeOne Electronic Parts Non-scale ADMGLWW

LED module with magnetic switch with lead wire : Blue : BitTradeOne Electronic Parts Non-scale ADMGLWBL

Polyurethane copper wire (red coating) Diameter 0.1 mm Length 10 m : Sakatsu Material Non-scale 4508

LED module with magnetic switch 3 set : Yellow : BitTradeOne Electronic Parts Non-scale ADMGLYE3

Chochin B Red Sake, Yakitori, etc.: Sakatsuo Kit HO(1:87) 1510

LED module with magnetic switch 3 sets : Blue : BitTradeOne Electronic Parts Non-scale ADMGLBL3

LED module with magnetic switch 3 set : Purple : BitTradeOne Electronic parts Non-scale ADMGLPR3

Small TV with LED : Sakatsuo Unpainted Kit HO(1:87) 1507

Flashing control Super 8 extension board (for LED with connector, 8 lights can be installed): Sakatsuo Electronic Components 2577

Flashing control Super 8 basic board (for LED with connector 8 lights can be mounted): Sakatsuo Electronic Components 2576

Basic Always Lighting 10 USB Type-C Basic Board (for LED with connector, USB power supply separately required) : KEIGOO Electronic Parts Non-scale 99013

Chochin D White Okonomiyaki, Chinese noodles, etc.: Sakatsuo Kit HO(1:87) 1514

90mm Cube Miniature "Kowloon Castle" : Taro, Diorama art work Non-scale 275

Extension Always Lighting 10 with extension cord (for LED with connector, 10 lights can be installed) : KEIGOO Electronic Parts Non-scale 99015

Wobbling lights extension board (for 4 LED lights with connectors): Sakatsuu material 2573

Ramen "Itsuki" : Nobuko Kameda - Painted non-scale