Glossary · Flashlights

Lumens

Lumens measure the total light a source emits in all directions. High lumens mean a bright, floody wall of light, but say nothing about how far the beam throws. Read lumens together with candela and the runtime graph, not alone.

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Related terms

Candela
Lux
CRI
Tint
Throw vs Flood
TIR Optic

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