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Electric, Light Brick 4.5V 2 x 2 with 2 Plug Holes, Trans-Clear Smooth Lens
Bricklink ID:08010cc01
Weight:2.800 g
08010cc01

Sets with this part (from Bricklink)
  Part color Yellow
 


 Set nameRelease yearQuantity
11151115 Lighting Brick, 4.5V19801
970970 Lighting Bricks19782

  Part color Red
 


 Set nameRelease yearQuantity
995995 Lighting set19692