The lighting devices particularly the headlights must be properly aligned such that they cannot cause inconvenience to other road users and at the same ensure adequate illumination of the road ahead. The aim should be tested at least once a year or when a new headlight has been fitted or there has been a change of the front-end body work. The process is only advisable for the short-term and should only be done so until a specialist can make the necessary alterations. The headlights have two adjusting screws: the vertical screw is easily located at the top of the unit and the horizontal screw is placed at the back of the housing and both need a Phillips screwdriver for turning. First, park the vehicle in a flat ground and facing a wall where there is no graph or design, then place a vertical masking tape that corresponds to the center of the car and both headlights. A horizontal tape line should also be placed in reference with the centerline of the head lights preferably when the car is parked slightly at a distance of couple of inches from the test surface for easy alignment of the tapes. The vehicle should be parked 25 feet away from the wall and leveled, with RPM between 3000 and 3500 with half tank of gas and no load. For Low beam adjustments the high intensity area should be positioned two inches below the HC line located two inches to the side of the HL vertical line away from the traffic coming in the opposite direction The Low beam is to be adjusted by utilizing either the top screw for lowering or raising the beam or the inside screw for adjusting it to the left or the right. Where the high beams are on, the high-intensity area should be placed just slightly below the straight line and noting that low beams are more used often and very essential for safety. It is recommended that the headlights should be correctly set by a professional centre as soon as it is possible.