How Bright Should Outdoor Floodlights Be

By Della Gracia | April 1, 2021

How Bright Should Outdoor Floodlights Be?

Exterior floodlights provide security, improve visibility, and accentuate architectural features. Choosing the right brightness ensures optimal performance without causing discomfort or light pollution. Here's a guide to help you determine the ideal brightness based on your specific needs.

Determining Brightness:

  • Lumens: Measured in lumens, brightness quantifies the total amount of light emitted by the floodlight.
  • Lux: Refers to the light intensity at a given distance, usually measured in foot-candles (fc). For outdoor areas, aim for 5-15 fc.

Factors to Consider:

  • Purpose: Determine the intended function - security, general illumination, or accent lighting.
  • Area Size: Calculate the square footage of the area to determine the required light output.
  • Surrounding Environment: Consider nearby reflective surfaces that may affect light dispersion.
  • Light Pollution: Respect neighbors and reduce light trespass by aiming floodlights downwards.

Brightness Recommendations:

  • Security Lighting: 1,200-2,500 lumens (20-40 fc)
  • General Illumination: 800-1,500 lumens (10-20 fc)
  • Accent Lighting: 500-1,000 lumens (5-15 fc)

Additional Tips:

  • Use floodlights with adjustable brightness to customize the light output.
  • Place floodlights at an optimal height and angle for maximum coverage.
  • Consider motion sensors to activate floodlights only when needed.
  • Install dimmer switches for increased flexibility in controlling brightness.


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