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Lumens to Watts Calculator
Calculate the watts needed for your desired lumen output
LED Wattage Calculator
Common LED Equivalents
25W Halogen
→ 3-4W LED (250lm)
40W Halogen
→ 5-6W LED (400lm)
50W Halogen
→ 6-8W LED (500lm)
75W Halogen
→ 8-12W LED (750lm)
100W Halogen
→ 12-15W LED (1000lm)
How This Calculator Works
Formula: Watts = Lumens ÷ LED Efficacy (lm/W)
Efficacy measures how efficiently an LED converts electricity to light.
Higher efficacy = fewer watts needed for same brightness.
Range provided accounts for different LED quality levels available in SA.
💡 LED Selection Tips
- • Look for LEDs with 90+ CRI for better color rendering
- • Choose 3000K for warm white, 4000K for neutral white
- • Dimmable LEDs cost more but offer flexibility
- • Check warranties - quality LEDs offer 3+ years
- • Buy from reputable SA suppliers for SANS compliance