Welcome to TimeGiver's demo for Philips Hue smart lights--DOES NOT WORK IN INTERNET EXPLORER

TimeGiver is a piece of computer code that builds smart lighting rhythms: 24-hour schedules that tell the lights how to change during the day to copy the sun in your location. The rhythm tells the lights how to rise in the morning, how to change colors during the day, and how to set in the evening. TimeGiver can use color lights placed around a room to copy the color of a clear sky at your location. In nature, these kinds of changes in sunlight tell our brains when to have energy and when to feel sleepy. But humans today spend most of our time indoors, so our brains may get confused about when to be awake and when to be tired. By building a rhythm for indoor lights around your daily schedule and your local sunlight, TimeGiver may help you feel more alert during the day and sleep better at night.

TimeGiver has lots of settings that allow you to make your rhythm just right for you and your home. But all the settings have good defaults, so to get started all you need to do is pick times to wake up and go to sleep and to specify your approximate location. The box above shows your rhythm over 24 hours, starting at midnight. Taller lines are brighter, and the color of the lines is the real color that the lights will have at each moment. The sun and moon show your wake time and bed time and how bright your lights are at that moment. The person raising hands shows where you are in the rhythm right now. You can change the settings below and see the difference in your rhythm. Press the Start Demo button to set up your rhythm to work with your Philips Hue smart lights, and then use the list of lights that shows up to pick which of your lights you want to change and which you want to have turn on by themselves in the morning. The demo will only work as long as this page is open and your computer is awake and connected to your network, and lights will only follow the schedule when they are turned on. For more information about TimeGiver, check out: TimeGiver on GitHub

General Purpose Rhythm Settings⬆⬇

Sky Simulator Settings ⬆⬇

Settings most people may want to change⬆⬇

Maximum Yellow Brightness: %The brightest you want your yellow lights to get at midday, which is 100% for most lights. Setting this higher than the maximum blue brightness mimics direct sunlight at midday.

Minimum Yellow Brightness: %The dimmest you want your yellow lights to get in the late evening and overnight. Think of this as your nightlight level, just enough light to safely use the bathroom or grab a snack. Setting this higher than the minimum blue brightness mimics direct sunlight in the late evening.

Maximum Blue Brightness: %The brightest you want your blue lights to get at midday, which is 100% for most lights. Setting this higher than the maximum yellow brightness mimics indirect sunlight at midday.

Minimum Blue Brightness: %The dimmest you want your blue lights to get in the late evening and overnight. Think of this as your nightlight level, just enough light to safely use the bathroom or grab a snack. Setting this higher than the minimum yellow brightness mimics indirect sunlight in the late evening.

Maximum Sky Color Temperature: KThe coolest (or bluest) you want your lights to get at midday. Higher is cooler, and most lights max out around 6500K.

Minimum Sky Color Temperature: KThe warmest (or reddest) you want your lights to get in the mornings and evenings. Lower is warmer, and most lights bottom out around 2700K.

Maximum Sky Simulator Scatter Distance: KHow extreme the contrast between your blue and yellow lights will be at midday. Higher numbers make for more saturated colors at midday.

Minimum Sky Simulator Scatter Distance: KHow extreme the contrast between your blue and yellow lights will be in the early morning and late evening. Higher numbers make for more saturated colors at sunrise and sunset.

Maximum Sky Simulator Angle Shift: degreesHow much the yellow lights are shifted toward deeper yellows and your blue lights are shifted toward deeper blues in the early morning and late evening. Higher numbers make for more yellow sunsets, but numbers too high can bring out greens and purples beyond a typical sunset. Lower numbers make for more white or pink sunsets.

Minimum Sky Simulator Angle Shift: degreesHow much the yellow lights are shifted toward deeper yellows and your blue lights are shifted toward deeper blues around midday. Higher numbers make for more dramatic, colorful middays, as in the region around a wildfire. This should usually be left at 0.

Minimum Sun Radius: degreesThe minimum radius of the sun in degrees at its zenith. Higher numbers may be required in sky projection systems with less dense light placement.

Additional Sun Radius: degreesThe additional radius of the sun in degrees at sunrise and sunset beyond the minimum above. Higher numbers may be required in sky projection systems with less dense light placement.

Settings some people may want to change⬆⬇

Sunrise Yellow Brightness Length: minutes, or: How fast your yellow lights get brighter in the morning in minutes from sunrise. Setting this lower than the sunrise blue brightness length makes for a more dramatic golden hour around sunrise.

x times half day length How fast your yellow lights get brighter in the morning as a fraction of the half day length. Setting this lower than the sunrise blue brightness length makes for a more dramatic golden hour around sunrise.

Sunset Yellow Brightness Length: minutes, or: How fast your yellow lights get dimmer in the evening in minutes from before sunset. Setting this lower than the sunset blue brightness length makes for a more dramatic golden hour around sunset.

x times half day length How fast your yellow lights get dimmer in the evening as a fraction of the half day length. Setting this lower than the sunset blue brightness length makes for a more dramatic golden hour around sunset.

Sunrise Blue Brightness Length: minutes, or: How fast your blue lights get brighter in the morning in minutes from sunrise. Setting this higher than the sunrise yellow brightness length makes for a more dramatic golden hour around sunrise.

x times half day length How fast your blue lights get brighter in the morning as a fraction of the half day length. Setting this higher than the sunrise yellow brightness length makes for a more dramatic golden hour around sunrise.

Sunset Blue Brightness Length: minutes, or: How fast your blue lights get dimmer in the evening in minutes from before sunset. Setting this higher than the sunset yellow brightness length makes for a more dramatic golden hour around sunset.

x times half day length How fast your blue lights get dimmer in the evening in minutes as a fraction of the half day length. Setting this higher than the sunset yellow brightness length makes for a more dramatic golden hour around sunset.

Sunrise Color Temperature Length: x times half day length, or: How fast your lights go from warm to cool in the morning as a fraction of half your day length.

minutesHow fast should your lights go from warm to cool in the morning in minutes from sunrise.

Sunset Color Temperature Length: x times half day length, or: How fast your lights go from cool back to warm in the evening as a fraction of half your day length.

minutesHow fast should your lights go from cool back to warm in the afternoon in minutes from before sunset.

Settings few people may want to change⬆⬇

Rising Sun Altitude at Maximum Blue Brightness: degreesThe sun altitude during sunrise at which the blue part of the sky reaches its maximum brightness.

Rising Sun Altitude at Minimum Blue Brightness: degreesThe sun altitude during sunrise at which the blue part of the sky starts to get brighter.

Rising Sun Altitude at Maximum Yellow Brightness: degreesThe sun altitude during sunrise at which the yellow part of the sky reaches its maximum brightness.

Rising Sun Altitude at Minimum Yellow Brightness: degreesThe sun altitude during sunrise at which the yellow part of the sky starts to get brighter.

Setting Sun Altitude at Maximum Blue Brightness: degreesThe sun altitude during sunset at which the blue part of the sky starts to get dimmer.

Setting Sun Altitude at Minimum Blue Brightness: degreesThe sun altitude during sunset at which the blue part of the sky reaches its minimum brightness.

Setting Sun Altitude at Maximum Yellow Brightness: degreesThe sun altitude during sunset at which the yellow part of the sky starts to get dimmer.

Setting Sun Altitude at Minimum Yellow Brightness: degreesThe sun altitude during sunset at which the yellow part of the sky reaches its minimum brightness.

Simulated Altitude: degreesThe simulated altitude in degrees of the point in the sky being simulated. The zenith or top of the sky is 90 degrees while the horizon is 0 degrees.

Simulated Azimuth: degreesThe simulated azimuth in degrees clockwise from north in of the point in the sky being simulated. Due north is 0 degrees, due east is 90 degrees, due south is 180 degrees, and due west is 270 degrees.

Sunrise Sky Simulator Scatter Distance Length: x times half day length, or: How fast the contrast between your blue and yellow lights gets more extreme in the morning as a fraction of half day length. Higher numbers make for a smoother transition between the saturated colors of sunrise and the paler colors of midday.

minutesHow fast the contrast between your blue and yellow lights gets more extreme in the morning in minutes from sunrise. Higher numbers make for a smoother transition between the saturated colors of sunrise and sunset and the paler colors of midday.

Sunset Sky Simulator Scatter Distance Length: x times half day length, or: How fast the contrast between your blue and yellow lights gets less extreme in the evening as a fraction of half day length. Higher numbers make for a smoother transition between the paler colors of midday and the saturated colors of sunset.

minutesHow fast the contrast between your blue and yellow lights gets less extreme in the evening in minutes from before sunset. Higher numbers make for a smoother transition between the paler colors of midday and the saturated colors of sunset.

Sunrise Sky Simulator Angle Shift Length: minutes, or: How fast the shift of your yellow lights toward deeper yellows and your blue lights toward deeper blues fades in the morning in minutes from sunrise. Higher numbers make for a longer morning golden hour.

x times half day length How fast the shift of your yellow lights toward deeper yellows and your blue lights toward deeper blues fades in the morning as a fraction of half day length. Higher numbers make for a longer morning golden hour.

Sunset Sky Simulator Angle Shift Length: minutes, or: How fast the shift of your yellow lights toward deeper yellows and your blue lights toward deeper blues increases in the evening in minutes from before sunset. Higher numbers make for a longer afternoon golden hour.

x times half day length How fast the shift of your yellow lights toward deeper yellows and your blue lights toward deeper blues increases in the evening as a fraction of half day length. Higher numbers make for a longer afternoon golden hour.

Sunrise Sky Simulator Scatter Distance Slope: How fast the contrast between your blue and yellow lights gets more extreme early in the morning compared to later. Higher numbers mean more pronounced increase in saturation of colors earlier in the morning and less change around midday.

Sunset Sky Simulator Scatter Distance Slope: How fast the contrast between your blue and yellow lights gets less extreme late in the afternoon compared to earlier. Higher numbers mean more pronounced decrease in saturation of colors later in the evening and less change around midday.

Sunrise Sky Simulator Angle Shift Slope: How fast the shift of your yellow lights toward deeper yellows and your blue lights toward deeper blues decreases early in the morning compared to later. Higher numbers mean shorter golden hours in the morning without changing coloration at midday.

Sunset Sky Simulator Angle Shift Slope: How fast the shift of your yellow lights toward deeper yellows and your blue lights toward deeper blues increases late in the evening compared to earlier. Higher numbers mean shorter golden hours in the evening without changing coloration at midday.

Sunrise Yellow Brightness Slope: How fast your yellow lights get brighter early in the morning compared to later. Higher numbers mean fast early sunrises that slow down later.

Sunset Yellow Brightness Slope: How fast your yellow lights get dimmer later in the evening compared to earlier. Higher numbers mean slow early sunsets that speed up later.

Sunrise Blue Brightness Slope: How fast your blue lights get brighter early in the morning compared to later. Higher numbers mean fast early sunrises that slow down later.

Sunset Blue Brightness Slope: How fast your blue lights get dimmer later in the evening compared to earlier. Higher numbers mean slow early sunsets that speed up later.

Sunrise Color Temperature Slope: How fast your lights get cooler early in the morning compared to later. Higher numbers mean fast early sunrises that slow down later.

Sunset Color Temperature Slope: How fast your lights get dimmer later in the evening compared to earlier. Higher numbers mean slow early sunsets that speed up later.

CIE 1931 Chromaticity Diagram Visualizer⬆⬇

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Visualizer TimeThe simulated time for use with the CIE 1931 Visualizer, which shows the xy coordinates of the blue point on the left, a white point in the middle, and the yellow point on the right for your understanding of how the sunlight simulator works.

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Attributions⬆⬇

TimeGiver is based on the research and development work of Timothy Lee, a 4th-year medical student at Mayo Clinic Alix School of Medicine going into academic psychiatry with strong interests in mood disorders, circadian rhythm disorders, and the importance of regular, restorative sleep to good mental health. Questions and comments can be directed to Timothy Lee on Github or LinkedIn.

License & Disclaimer⬆⬇