What kind of work is the laser level going to be used for?
Are you building decks or house foundations? Is the work indoors, outdoors, or maybe even a combination of both?
If you are indoors, you want a visible beam laser that can be used without an electronic laser receiver. These visible red and green beams are usually found on laser levels employed in interior work, such as drywall, drop ceiling installation, or partition installation. You will see red beam wavelengths of 650nm or 635nm. The human eye is more sensitive to the 635 wavelength than 670, and is even more sensitive to green light. Johnson laser levels have a green laser beam – what we call GreenBrite® technology which is 400% brighter than a red beam in ordinary laser levels.
If you are primarily outdoors, you will have to use a laser receiver, as even the brightest visible rotating beam will be lost in daylight. Infra-red light is invisible to the human eye, which means that an electronic laser receiver must be used. Infra-red beams are most often found on lasers employed for outdoor work, such as grading, trenching, or setting concrete forms.
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