At toolbar, Tools > Add-ins > Select "SpurGear"

Set the settings required for gears creation, do remember the module of both gears must be the same

After creating of the gears, "move" the gears to measure the center to center distance.

The distance will be the sum of radius of the pitch diameter(check whether does the pitch diameter intersect one another only at 1 point), then that will be the distance need to design on the lamp cover

After moving, can rotate one of the gears to make it look they perfectly match (if pitch diameter met at only 1 point, then gear set should work)

Create sketch on the driven gear (the one move because of another gear is driving through supply)

Create construction circle for reference to create slot to place the lampshade holder

Make a slot hole creation to mount the lampshade support/holder

Extrude out to create holes

Gear Design:

Create a circle frame, with a hole size about the same as the hole size created on the lampbox cover for LED to flash through.

The construction circles are made as a reference diameter/size of the lampshade to place above it

Below the circular frame, create sketch to form slots to join with gears

After extrude, use circular pattern to form the remaining slots.

Lampshade Holder: