This article explains the differences between the four main beam patterns of Vision X off-road lighting.
The Euro (Medium Beam) is designed to produce a very strong beam of light with a longer range than the normal pattern. The Euromuster can actually project its beam up to 250 feet away by 250 feet wide! This pattern is designed to illuminate the side of the road and make it easier to recognize pedestrians and street signs while driving. To achieve this, the euro lenses are angled slightly upwards and to the right at an angle of 15 degrees.
The flood (wide beam) is a much wider pattern than the euro or spot, but has a much shorter range. The width of the flood pattern extends up to 80 feet, while the range is up to 60 feet. The flood pattern is very suitable for distributing light and for illuminating larger areas with just one light bulb. The flood beam is considered a wide-angle pattern with a width of up to 80 feet and a range of about 60 feet at an angle of 35 degrees.
The spot (narrow beam) is a very concentrated pattern that is very narrow and yet very long. Comes with a width of up to 10 feet and a range of 1000 feet. This pattern creates a more intense center to illuminate objects directly in front of you while sacrificing usable sidelights. The spot beam has an angle of 10 degrees.
The elliptical trainer is a fairly wide pattern that is very similar to the Euro style, except that it is the only non-round beam pattern. This rectangular, wide pattern is 45 degrees wide and 15 degrees high.
To sum up: the flood beam is wide but short, the spot beam is narrow but long, the Euro beam is between the two and the elliptical beam is the only non-round beam among the four. Further information on light beam patterns for auxiliary and off-road headlights can be found at http://www.VisionXonly.com