Laser levels are available with two laser colour types, Green or Red. Green beam lasers appear much brighter to the human eye they are typically used indoors on larger scale projects where the beam needs to be visible over long distances or in bright conditions.

Types of Laser Level

Line Laser Level: This a point-to-point level that projects a visible thin line onto a surface. Designed for indoor use, they often include plumb up and plumb down capabilities.
Dot Laser Level: A simple point is projected that can be level, square or plumb. A wide variety of models are available that project dots at 2 points for verticals, 3 points for verticals plus horizontal or 5 points for verticals, horizontals and 45° in-between.
Rotary Laser Level: These lasers use a prism driven around by a small motor to produce a 360° laser line over long distances. These lasers are generally designed for creating horizontal lines but there are models that can also work vertically. Ideal for outdoor work, such as grading roads, laying foundations, or laying pipe, these are the most accurate laser levels.

Manual or Auto Levelling
Manual laser levels work in the traditional way: The user lines up a bubble inside a vial either by repositioning the level or turning a knob. Well-suited for typical do-it-yourself projects, these laser levels are less expensive and require less battery power than a self-levelling unit.
Self-levelling units offer a greater degree of accuracy. They work best when placed on a surface that the user determines is "close to level." You can use a bubble vial to manually level the unit before the unit's self-levelling mechanism takes over. The laser component hangs like a pendulum inside the level. Magnets and gravity work together to still the pendulum, and the beam is then projected through a light or prism.

Laser Levels