Note reference number

1. The reference number or luminous intensity

The reference number (Ref.) is a value that refers to driving lamps. According to ECE regulations, this reference number must not exceed the upper limit of 100 per vehicle.
The two values of the standard high beam (left and right main headlight) are counted here in addition to the values of other mounted high beam headlights.

The value is entered on the lens of approved headlights. That means if 4 headlights with a reference number of 25 each are installed, the lower two will go out when switching on. Then there are no problems.

Who does not couple it with the normal high beam and puts it on an extra switch, should consider the following. The switch or display in the vehicle must light up blue and be in the direct field of vision of the driver.