The Light Output Guide

The Light Output Guide provides an understanding of:

  • Power and Performance of LEDs
  • LEDs performances vs Traditional Commercial Lighting
  • Understanding Label Information

Watts to Lumens conversion table

Until you’re comfortable using lumens to calculate how much light a bulb will produce, use the table below as a guide:

Watts vs Lumens
What's the difference?

The reason this is such a confusing concept is that lumens and watts measure different things.

Lumens (indicated by lm) are a measurement of the total amount of visible light to the human eye from a light source. The higher the lumen rating, the brighter the luminaire will be.

Watts is a measurement of the energy used to power the luminaire. The higher the bulb wattage, the less efficient the bulb is in conserving energy. 

In simple terms:

  • More Wattage = More Money
  • More Lumen = Brighter

Buy lighting based on Lumens
NOT Watts

For years, buying incandescent lighting was based on wattage. But as energy-efficient bulbs like CFL’s and LEDs have become available, watts have become an unreliable measurement for choosing the right bulbs.
Instead of just focusing on wattage, you should consider the brightness of the LED bulbs which is measured by lumens.
  • The symbol Lm measures Lumen output (you can see this on the product specifications.)
  • Lux means lumens per square meter, and foot-candles mean lumens per square foot.
Lumens & Wattage

Office Lighting

We recommend that the office room is bright enough that employees can be productive and perform simple tasks. The number of lumens needed for each light will depend on the size of the office.

On average, office lighting requires around 700 lumens per square meter. That means that every 6’×6′ cubicle requires at least the same amount of light you would receive from a 35-watt incandescent light bulb. Focused lighting should be dedicated by task lamps around (700 -1200lm)

Speak to a BrightSpark for recommended Lumens for your business.

Choosing the right lumen level for your business

Below we have listed a few Lumen consideration in Commercial Spacing:
Environment
Lux
Hospital Theatre
1,000
Supermarket, Sports Hall
750
Factory, Workshop
750
Office, Show Rooms
500
Laboratories, Kitchens
500
Warehouse Loading Bays
300 – 400
School Classroom
250
University Lecture Hall
250
Lobbies, Public Corridors,
200
Stairwells
200
Warehouse Aisles
100 – 200
Homes, Theatres
150
Family Living Room
50

Is your lighting burning through your business expenses?

What is an Efficacy rating

An efficacy rating is a measure of how much light a luminaire produces for the energy put into it. The higher the efficacy ratio, the more efficiently your product is performing. An LED can use up to 90% of its energy input to produce light whilst the remaining 10% converts to heat.

Think of this as similar to miles-per-gallon in a car, as a higher lm/W means higher efficiency and lower running costs, getting the most out of your fuel compared to similar but less efficient car engines.

Reduce Your Energy Bill By 90%

LED lights are an extremely efficient light source. They use much less power to produce the same brightness when compared to traditional lighting. If you are still using old bulbs & you change to LED you could reduce you energy bill by 90%. 

Energy Wasted Producing Heat

Energy Used to Produce Light

LED
0 %
0 %
Compact Fluorescent
0 %
0 %
Incandescent
0 %
0 %

3 technical components that affect efficacy ratings:

1. LED Chips

  • COB (Chip on Board) mounts the chips directly to the substrate, which has a large cooling area. COB has superior thermal conductivity compared to the SMD
  • SMD (Surfaced Mounted Diodes) are flatter than COB chips and come with a longer lifespan and consume up to 75% less energy.

2. Driver Losses

  • LEDs require a driver which converts line voltage to low voltage and current from AC to DC and may include additional electronics for dimming and colour correction.
  • Fluorescent and HID light sources cannot function without a ballast, which provides a starting voltage and limits electrical current to the lamp.

3. Thermal Effects Losses

  • Poor installation or material covering the LED airflow can damage the lamp and the light output.
  • Fluorescent and HID light sources cannot function without a ballast, which provides a starting voltage and limits electrical current to the lamp.

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Welcome

Welcome to the LSO very own support channel. We want to make lighting less technical and more valuable for you. The Hub provides a breakdown on all things LED lighting related. Useful tips and tricks and on-site support with a BrightSpark Expert that you can phone, email or even live chat with a time that suits you.

Keep an eye out for our BrightSparks. These are our experts on what you need to know. Click on the links to get help whenever you need it. 

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