The four kinds of artificial skylight
Printed sky panels, smart LED sky panels, daylight-level hanging skylights and recessed sky simulators: what each one is, how bright it is, what it costs...
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Guides
Insights from Sunday Light on daylight, health and performance.
Is there a SAD light that lights the whole room?
Yes. What counts for SAD is how much light reaches your eyes and for how long. How the light box dose works, what a whole-room...
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Light glossary: lux, lumens, CRI, kelvin and more
Twenty-two terms that come up when you compare bright lights, SAD lamps and artificial skylights, each with a number where one exists.
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How to light a north-facing room
From September to March a north-facing room in the UK gets no direct sun at all. What to buy, which colour temperature to run at...
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How many lumens a room needs to feel like daylight
The arithmetic for daylight indoors: lumens, lux, the 250 melanopic EDI recommendation, and a table of how many lumens rooms of 10-30 m² need.
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High-CRI ceiling lights: what CRI 95+ gets you
Most home ceiling lights are CRI 80-90. What CRI and R9 measure, what 95+ changes in a living room, and every bright high-CRI option we...
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How to get daylight in a room with no windows
A windowless room loses two things: brightness and any cue for the time of day. How bright to light it, what schedule to run, and...
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CoeLux alternatives for a home
What CoeLux does best, why it is hard to fit in a house, and what you give up and gain with Innerscene, Sunday Light, sky...
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The brightest light for a dark flat
A dark flat isn't short of lamps. It's short of a big, bright source overhead. What each option puts out, and what it takes to...
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The brightest light fittings you can put in a home
Lights over 30,000 lumens exist, but most were built for warehouses and street lamps. What each one puts out, why home lights rarely go this...
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Bright light for afternoon focus when you work from home
The afternoon dip is biological, and in controlled studies bright light lifts it. What the studies used, how to time it around your sleep, and...
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Basement apartment lighting that feels like daylight
The brightest bulbs, floor lamps and ceiling lights you can buy for a basement apartment, what each puts out, and what it takes to make...
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