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

Self-propelled mini mini train with built-in battery : Yoshiaki Ishikawa Painted Completed N (1:150)

Self-propelled mini mini train with built-in battery : Yoshiaki Ishikawa Painted Completed Product N (1:150)

mini special case (Miniatuart mini / Studio Ghibli mini) : Sankei Display Case MC-01

Battery-Powered Self-Propelled Miniature Train : Yoshiaki Ishikawa Pre-painted N (1:150)

Battery-Powered Self-Propelled Miniature Train : Yoshiaki Ishikawa Finished product N (1:150)

Miniatuart mini Christmas ver. [Ski Lodge] : Sankei Kit Non-scale MP05-12

Light Truck 1 - Silver : Icom Finished product N (1:150) MLV-6001

Miniatuart mini Christmas ver. [Christmas Tree] : Sankei Kit Non-scale MP05-11

Pear Rail for Mini-mini Train, Daiso Case Compatible (200x100mm) : Yoshiaki Ishikawa Railroad Tracks 9mm Gauge N (1:150)

Dummy light lens 7mm diameter : Sakatsu Material Non-scale 4574

Mini Mini Train Rail R50 (Inner diameter 8cm, Outer diameter 12cm) : Yoshiaki Ishikawa Railroad Track 9mm gauge N(1:150)

064-00013 Choshi Electric Railway Station Employee 5 : Tiny Tales - Colored 1:64

R18 Oval for Mini-mini train, compatible with Daiso case (205x55mm) : Yoshiaki Ishikawa, Railway Track 9mm Gauge N(1:150)

064-00002 Woman talking and walking with a red handbag : Tiny Tales - Colored 1:64

Miniatuart mini Christmas ver. [Father Christmas] : Sankei Kit Non-scale MP05-13

064-00014 Choshi Electric Railway Station Employee 6 : Tiny Tales - Colored 1:64

R25 oval for mini mini train, for Daiso case (145x65mm) : Gimei Ishikawa Railroad Track 9mm gauge N( 1:150)

Optical fibre 0.75mm diameter, 1.5m length : Sakatsu Material Non-scale 4547

Dummy light lens 10mm diameter : Sakatsu Material Non-scale 4576

Little Wooden House Window Kit D : YES Workshop Unpainted Kit Non-scale No.06