1. What is Lumens Calculation?

The lumens calculation determines the total visible light output from a 100-watt light source based on its efficacy (lumens per watt). This helps compare different lighting technologies and their energy efficiency.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( 100 \) — Wattage of the light source
• \( Efficacy \) — Light output efficiency in lumens per watt (lm/W)

Explanation: The formula multiplies the wattage by the efficacy to determine total light output in lumens.

3. Importance of Lumens Calculation

Details: Understanding lumens helps in selecting appropriate lighting for spaces, comparing energy efficiency of different bulbs, and meeting lighting requirements for various applications.

4. Using the Calculator

Tips: Enter the efficacy value in lumens per watt (lm/W). Typical values range from 10-20 lm/W for incandescent bulbs to 80-100+ lm/W for LEDs.

5. Frequently Asked Questions (FAQ)

Q1: What is a good efficacy value?
A: Higher is better. LEDs typically offer 80-100+ lm/W, while incandescent bulbs are around 10-20 lm/W.

Q2: How many lumens is a 100W incandescent bulb?
A: About 1600 lumens (assuming 16 lm/W efficacy).

Q3: What affects light efficacy?
A: Technology (LED, CFL, incandescent), quality, temperature, and age of the bulb.

Q4: Is higher lumens always better?
A: Not necessarily - it depends on the application and desired lighting level.

Q5: How does this compare to lux?
A: Lumens measure total light output, while lux measures light intensity at a surface.