6pcs Low Voltage DC Motor Speed Controller 1.8v 3v 5v 6v 7.2v 12v 2A 30W PWM 1803BK Adjustable Driver Switch with Speed Control
Aliexpress UK
Also, great for craft projects! These Everstar franchise lights are an original and require no assembly or batteries.
eBay
Enhance the ambiance of your bathroom with this contemporary Commercial Electric 4 in. Color Selectable CCT LED Recessed Light Trim. The light color can be switched between white and warm white, with a brightness control feature. The light is hardwired and has a voltage of 120V, with a power consumption of 10W - 24W. Made of amber and acrylic, this round-shaped recessed light has a diameter of 5 inches and a height of 3.06 inches. It has an IP44 rating and is suitable for indoor use. The product line is 4 inch Color Selectable CCT, with a model name of Commercial Electric. The light comes with a switch control style and a sensor light.
eBay