🔁 Watt ↔ Lumens Calculator

💡 Tip: Use the number printed on the bulb or package. Bulb efficiency depends on type.

🔁 Watt to Lumens Calculator & Lumens to Watts Converter

Need to know how bright a bulb is? Or trying to figure out how much energy a light uses? This simple light bulb conversion calculator lets you quickly convert:

  • 💡 Watts to lumens (brightness estimate)

  • ⚡ Lumens to watts (power usage estimate)

Whether you’re shopping for LED, CFL, halogen, or incandescent bulbs, this tool helps you make smart lighting choices in seconds.

🔧 What Are Lumens and Watts?

  • Watts = how much energy the bulb uses

  • Lumens = how much light the bulb produces

Modern energy-efficient bulbs like LEDs use fewer watts to produce the same lumens as old-school incandescent bulbs.

⚙️ Common Conversion Rates (Approximate)

Bulb Type Efficiency (Lumens per Watt) Example
Incandescent ~15 lm/W 60W = 900 lm
Halogen ~18 lm/W 50W = 900 lm
CFL ~60 lm/W 13W = 800 lm
LED ~80 lm/W 10W = 800 lm

📌 When to Use This Calculator

  • Replacing bulbs and want the same brightness

  • Switching to LED and want to use less power

  • Estimating wattage for energy usage or cost

  • Comparing bulb types while shopping

✅ Examples

  • Convert 60 watts (Incandescent) ➝ ~900 lumens

  • Convert 800 lumens (LED) ➝ ~10 watts

  • Compare 13W CFL vs 10W LED for same brightness

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