Watts to Lumens Calculator
Convert watts to lumens with our comprehensive calculator. Determine light output (lumens) for different bulb types based on wattage and luminous efficacy.
Step 1: Wattage Input
Understanding Wattage and Lumens
Watts measure power consumption, while lumens measure light output. Modern LED bulbs produce more lumens per watt than traditional incandescent bulbs.
Step 2: Efficacy Parameters
About Luminous Efficacy
Luminous efficacy measures how efficiently a light source produces visible light. Higher efficacy means more light output per watt of electrical power consumed.
Light Output Results
Total Light Output
Bulb Type Comparison
| Bulb Type | Efficacy (lm/W) | Lumens Output | Equivalent Incandescent |
|---|
Light Output Breakdown
Lumens Formula
Lumens = Wattage × Luminous Efficacy
To calculate total lumens: Multiply the total wattage by the luminous efficacy (lumens per watt). For multiple bulbs: Lumens = (Wattage per bulb × Number of bulbs) × Efficacy.
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