Dipped beam or low beam is the standard setting that helps light up the road ahead when it's dim or dark. The bulbs illuminate the road and allow other drivers to see you without dazzling other road users in the process. Full beam or high beam is the brightest setting and projects light upwards and outwards to allow drivers to see much more when driving in very dark conditions. This beam setting should not be used when other road users are in sight as it can cause dazzling.