You could easily install Blue Lug's original Koma Light on pretty much any part of your bike.

They are very tiny little lights, but the battery lasts for maximum of 20 hours, and can be recharged with an USB cable.

The name "Koma"(Spinning Top) comes from a classic Japanese toy which looks very similar to the product.

Specifications:

• Light Colour: White (Front) | Red (Rear)
• Battery Life: 8-20 hours
• Power: ~20 lumens
• Light Modes: Steady, Flash
• USB-chargeable (about 2 hours)
• Material: Aluminum
• Outer Diameter: ~3cm
• Come with M5, M6 bolts

Photo Credit: Blue Lug