Custom ultra-bright AKAI GX-747 indicator lights.  

Diameter about 3.5mm, length 18mm.  

The actual effect may differ from the pictures, but it looks much better in real life.  

The price is for 2 pieces.  

Compared to straight filament bulbs, these LEDs are brighter at the same power and last more than 10 times longer. A regular filament bulb lasts about 3000 hours, while an LED lasts about 50,000–100,000 hours.

AC/DC LED, no positive or negative polarity, you need to remove some screws on the GX-747's front panel and you’ll need a soldering iron.