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LED Brightness & Energy Calculator

Estimate power and energy consumption under different brightness levels

Screen Parameters
Enter screen parameters and brightness requirements to calculate energy consumption and costs
LED brightness and energy estimate
This calculator estimates screen area, pixel count, active power, and operating cost from brightness and display size.
Screen area = width × height
Pixel count = floor(width / pixel pitch) × floor(height / pixel pitch)
Estimated power = screen area × brightness × environment factor
Daily energy = power × 24 / 1000
Cost = energy × electricity rate
brightness
Target brightness
Usually expressed in nits or cd/m² for LED display surfaces.
environment factor
Indoor/outdoor adjustment
A simplified multiplier for expected brightness demand and operating conditions.
rate
Electricity price
Local energy price used to estimate operating cost.
How this brightness calculator works
Use it for early LED display planning, budget comparison, and sizing conversations before requesting vendor-specific power data.
  1. Calculate physical screen area from width and height.
  2. Estimate pixel count from screen dimensions and pixel pitch.
  3. Apply an environment factor for indoor, window-facing, or outdoor use.
  4. Estimate daily, monthly, and annual energy from the calculated power draw.
  5. Multiply energy use by electricity rate to estimate operating cost.

Important notes

  • Real LED power depends on content brightness, refresh behavior, calibration, cabinet design, and driver efficiency.
  • Outdoor screens often need more brightness headroom for daylight visibility.
  • Use manufacturer maximum and typical power ratings before final budgeting.
Brightness planning examples
Use these examples to compare indoor, storefront, and outdoor LED display assumptions.

Indoor meeting room wall

A controlled-light room needs comfortable brightness, not maximum outdoor output.

  • Width: 5000 mm
  • Height: 3000 mm
  • Brightness: 800 cd/m²
  • Environment: indoor

Estimated power and cost stay lower than outdoor settings.

Indoor displays can usually run at lower brightness, reducing heat and energy cost.

Window-facing retail display

A screen near a storefront window competes with daylight.

  • Environment: window
  • Higher target brightness than indoor use

Energy estimate rises with brightness and environment factor.

Brightness headroom matters for visibility, but operating cost increases.

Outdoor advertising panel

An outdoor LED panel must remain readable during bright daytime hours.

  • Environment: outdoor
  • Large display area
  • High brightness target

Power, thermal load, and annual cost become major planning factors.

Ask vendors for typical and maximum power figures before committing.

LED brightness FAQ
Common planning questions for brightness, power, and display environments.