25LED-D unit is designed for Goldwing GL 1800 models with the spoiler LED light-bar.                       

Dual function unit - it powers the LED light-bar with low intensity as a Running Light, and upon brake activation it flashes the light-bar at full intensity.

When you apply the brakes the brake light will modulate fast at first then slow down to a solid On over a four second period.

Internal circuitry is controlled by a microprocessor. The microprocessor allows for customizable features. The microprocessor can be programmed to adjust intensity of the Running Light feature.