TL;DR
Beam spread is the angular width of the light cone a fixture or lamp projects, stated in degrees and used to match each landscape light to its target: 10 to 15 degree spots reach high into trees or graze a column, 35 to 60 degree floods wash walls and shrub beds, and wider optics light broad areas. The geometry is practical, as the lit diameter is roughly the angle factor times distance, so a 60-degree lamp covers about a 9-foot circle at 8 feet.
What it means
Beam spread is the angular width of the light cone a fixture or lamp projects, stated in degrees and used to match each landscape light to its target: 10 to 15 degree spots reach high into trees or graze a column, 35 to 60 degree floods wash walls and shrub beds, and wider optics light broad areas. The geometry is practical, as the lit diameter is roughly the angle factor times distance, so a 60-degree lamp covers about a 9-foot circle at 8 feet. Many LED landscape lamps take interchangeable or adjustable optics, letting designers retune coverage after seeing the night effect. Mismatched optics show as hot spots or scalloped dark gaps along a facade.
Where it sits in the glossary
Beam spread is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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