The mark your light leaves on the night

NIGHTPRINT

Understand and protect the natural night.

Try "Ottawa" or "152 Elgin St" or "Banff National Park"

Check your light

Photograph your fixture or its packaging, or enter the details manually below.

📷Photograph your outdoor lightOr the box — we'll read the specs
📍
or enter details manually

Fixture type

Colour temperature — check the bulb or packaging

Shielding — does light spill upward or only go down?

Timer or motion control

🌙

Select or photograph a fixture to see its dark sky compliance verdict.

Dark sky compliance

Generating verdict…

Compliance checks

What to do about it

Generating recommendation…

What lives here after dark

Every light installed after dark is a decision about what lives here.

GBIFNASA VIIRS DNBOpenStreetMapBat Conservation TrustDarkSky International

Reading the night at

The night around

June

After dark, this place is far from empty. Here is what is awake nearby, and how it changes through the year.

Light is the biggest change we bring to the night.

It disrupts the insects first, then the bats, owls and birds that feed on them, and the food chain that links them. It reaches us too, in our sleep and our health.

Curious what your own outdoor lights do here?

Each point is a real wildlife record nearby

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