Amber Lightbar

In the case of a warning sign, the amber yellow light signal is meant, no other colour is recognised by the legislation. A warning device is defined in the legislation as a flashing amber light device fitted to a vehicle in fixed or mobile (mobile) mode. Such a warning signal is a yellow lightbar. In the case of warning signals, the audible signal is not included in the role of the signal.

Assembly of the yellow lightbar

One of the important considerations in the selection of a yellow lightbar installation is the roof width of the vehicle and the features you want to display. Yellow lightbars are usually available from most manufacturers in sizes between 60 and 180 cm. There are also mini yellow lightbars, which are usually 30 to 40 cm long, available in magnetic and fixed screw-on versions. Yellow beacons larger than 40 cm are recommended to be mounted with a fixed anchorage, as the increase in weight and air resistance can make them accident-prone.


The halogen and xenon bulbs used in the past have now been completely replaced by LED technology, which offers a long service life due to its lower power consumption. Most amber beacons are now of modern LED modular design, so that the configuration can be varied according to the user's requirements. For amber beacons in Europe, the number of modules is not specifically defined, but it is important that the flashing pattern of more than two modules should already be synchronised.


The flashing pattern of an amber lightbar is usually pre-programmed, so that the user or installer can choose the specification for the country concerned. When assembled, the number of modules depends on the size of the lightbar and the lighting effect required by the application. Control of the lightbar, i.e. switching it on and off and changing the type and mode of flashing, is done from a separate switch or switch module.


The yellow lightbar shall comply with the photometric parameters R65 and the EMC standard R10.

Persons entitled to use the amber lightbar

The range of persons entitled to use a yellow warning light is very wide because of the specific tasks involved. The legislation basically distinguishes between two groups. Those who do not need an official authorisation to be fitted and those who may be granted an official authorisation if the purpose of the vehicle operation justifies it. Examples of such users are:

  • road builders and waste management companies that carry out road or public works construction, cleaning, maintenance (repair), collection of municipal/communal waste, separately collected waste
  • public maintenance and wheel-clamping vehicles, i.e. vehicles regularly used for the official removal of vehicles or for the application of wheel clamps
  • asset protection and community policing, which are vehicles used for the transport of money and valuables in the context of the protection of persons and property or operated by a financial services organisation, or vehicles used for this purpose in the performance of community policing
  • a vehicle transporting or accompanying radioactive material
  • vehicles transporting materials on the road section concerned during road construction work
  • a vehicle exceeding the permitted length or width (oversize)
  • a vehicle accompanying an oversized vehicle
  • a vehicle regularly towing a vehicle which has broken down, if the vehicle is actually towing
  • a vehicle carrying out radio control, radio detection, radio monitoring, disturbance testing and measuring service activities

In certain cases, it is not necessary to apply for a special official authorisation to use a yellow lightbar, but the conditions described in the legislation must be met. The scope of users of amber lightbar is precisely described in IRM Decree 12/2007 (13.III.).