Task Lighting
Lumens
Kelvin
Seasons & the Human Body
Blue & Infrared Lighting
100

This type of lighting is designed to help people see clearly while doing specific activities.

What is task lighting?

100

Lumens measure the amount of this produced by a light source.

What is brightness?

100

Kelvin is used to measure a light’s this.

What is color temperature?

100

During winter, people are exposed to less of this type of light.

What is natural sunlight?

100

Blue light is commonly emitted from these devices.

What are screens?

200

Task lighting is especially important for activities like reading, studying, or this.

What is working on detailed tasks?

200

A higher lumen value means the light is this.

What is brighter?

200

Lower Kelvin values produce this kind of light.

What is warm (yellow) light?

200

Seasonal lighting changes can affect sleep and this mental state.

What is mood?

200

Blue light can interfere with this when used at night.

What is sleep?

300

One benefit of task lighting is that it reduces this problem caused by poor visibility.

What is eye strain?

300

Lumens measure light output, not this commonly confused term.

What is wattage?

300

Higher Kelvin values produce this kind of light.

What is cool (blue/white) light?

300

Shorter days can disrupt the body’s internal clock, also known as this.

What is circadian rhythm?

300

Infrared light is most associated with this sensation.

What is heat?

400

Desk lamps and under-cabinet lights are examples of this type of lighting.

What is task lighting?

400

A study lamp typically needs more lumens than this type of lighting.

What is ambient lighting?

400

A light around 5000–6500K is similar to this natural source.

What is daylight?

400

In summer, increased daylight often causes people to feel more this.

What is energized or alert?

400

Infrared lighting is often used in medical therapy and this.

What is muscle recovery?

500

Without proper task lighting, productivity and this can decrease.

What is focus or accuracy?

500

Lumens are measured using scientific tools that detect this.

What is visible light output?

500

Kelvin affects mood, focus, and this biological system.

What is the circadian rhythm?

500

This condition can be caused by reduced sunlight exposure in winter.

What is Seasonal Affective Disorder (SAD)?

500

Too much blue light exposure may affect eye health and this hormone.

What is melatonin?

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