The limit with conventional Bilux bulbs is a 45/45W headlight bulb on most scooters. The usually 80 W to max. 120 W power output of the ignitions does not give more. The luminosity measured in lumens is less than 400.
The LED headlight has a luminosity three times as high (1300 lumens). The power consumption is only 20 W. This corresponds to the luminous efficiency of a conventional 100 watt spotlight.
This means that a considerably better illumination can be achieved with a given generator/power supply. In addition, more capacity remains for other consumers.