// multi-utility computation suite · offline · instant · precise
┌──────────────────────────┐
│ [c] calcalyst_ │
│ computation suite │
└──────────────────────────┘
// select a module to initialize
/ search↵ open firstesc close
// adsenseEMPTY_LEADER_SLOT728×90
// adsenseMOBILE_ANCHOR_SLOT320×50
// keyboard_shortcuts
/focus search
↑↓navigate module list
Enter
open first result from search
open highlighted
compute when module is open
compute when focused in a field
Escclose module · clear selection
⌫
eng.lighting-lux-levels Calculator
Calculates required number of luminaires and spacing from illuminance target, fixture lumen output, and room geometry using the lumen method. The Coefficient of Utilisation accounts for room geometry and reflectances — a narrow room with dark walls requires more fixtures than a wide room with white walls.
Inputs
Lumens Per Fixture
Reference formula or conversion factor shown for context.
Fixture Count
Count of items or occurrences.
Room Area M2
Two-dimensional surface extent (m²). For complex shapes, break into simpler sub-shapes and sum.
Cu Coefficient
Reference formula or conversion factor shown for context.
Results
illuminance (lux)
Sample size or count used in the calculation.
illuminance (foot-candles)
Sample size or count used in the calculation.
total lumens (fixture output)
The combined total across all inputs and components.
IES recommended levels
The measured or computed level on the applicable scale.
adequate?
Whether the computed capacity, strength, or resource meets the minimum requirement.