FAQ

Most white LED bulbs use strong blue light around 450 nanometers. That’s the kind of light that signals your biology that it’s daytime. Even bulbs that look warm can have this hidden blue spike, which can block melatonin in the evening and confuse your body’s rhythm unless the light is filtered or dimmed way down.

Circadian lighting changes throughout the day to match how your body naturally works. In the morning and daytime, it includes more blue light to help you feel awake and alert. After sunset, it removes that blue light so your body can start getting ready for sleep. It still keeps a soft touch of violet light so the room feels gentle and calm, while your body makes melatonin – the hormone that helps you fall asleep.

Your eyes have special cells that can sense blue light. This kind of light helps you wake up in the morning by boosting your focus and telling your body to make more cortisol – the hormone that helps you feel alert. But if you see blue light at night, it can block melatonin, the hormone that helps you sleep. That’s why the timing and color of light are both important for keeping your body on a healthy daily rhythm.

Your body runs on a 24-hour clock called a circadian rhythm. It helps you know when to wake up, go to sleep, and stay healthy. There’s a tiny part of your brain that acts like your body’s timekeeper. It needs blue light in the morning to stay on schedule. When your rhythm is in sync, you feel awake during the day and sleepy at night. But if it gets off track, it can make you tired, moody, or even affect your health.

Blue light (between 440 and 495 nanometers) is the one that gets in the way of melatonin production – the hormone that helps you sleep. Even a small amount of blue light at night can fool your body into thinking it’s still daytime. That makes it harder to feel sleepy. But violet light (around 420 nanometers) doesn’t get in the way of melatonin as much, especially if your eyes have already been in light for about 30 minutes.

Not during the day. Blue light is great for you in the morning and through twilight hours as it helps you feel awake, think clearly, and keep your body clock running on time. But at night, blue light can block melatonin – the hormone that helps you sleep. So it’s helpful in the morning, but it gets in the way in the evening.

Yes. Staying away from blue light in the evening helps your body get ready for sleep. When you avoid the 440–495 nanometer range in the evening, your melatonin can rise like it’s naturally designed to do.

The best light for evening is one that is absent of blue wavelengths (440–495 nanometers), keeps a little violet below 440, and glows with warm amber or red light above 600. This gentle mix helps you wind down at night, and prepares your cells for recover while you sleep.

The blue band of light (440–495nm) has extraordinary biological power for twilight hours. It sharpens focus, synchronizes your circadian rhythm, regulates hormones, and activates your immune system. Just like the morning sun. It lowers melatonin (your sleep hormone) and boosts chemicals like cortisol, serotonin, and dopamine – helping you feel more awake, focused, and in a better mood.

Melatonin is your body’s signal that it’s time for sleep. It starts rising when your eyes stop seeing blue light (440–495 nanometers). This helps your body cool down, feel sleepy, and begin important repair work. When melatonin shows up on time, your body can rest and heal the way it’s meant to.

Korrus bulbs are the first circadian lights engineered to work in harmony with nature – not against it.

During the day, it increases the blue light to boost energy, focus, and align your internal clock – just like sunlight. At night, it eliminates blue light, restoring biological darkness – helping your body produce melatonin and ease into deep, restorative sleep. Most artificial lights just change colors and are too weak to fully wake us during the day, yet too strong to ignore after dark.

At Korrus, we purposefully engineer the spectrum itself. Our patented light engines, developed over 10 years and backed by 500+ global patents, manipulate energy output at the nanometer level – removing biologically disruptive wavelengths and tuning in those that promote cognition, rest, and recovery.

Yes. The right kind of blue light at the right time can shift your body clock. Light in the 440–495 nanometer range can move your rhythm by up to 90 minutes a day, which helps your body adjust faster when you travel or change your sleep schedule.

No. Color temperature tells you how the light looks – not how it signals and affects your biology (circadian impact). Two bulbs with the same color can have very different amounts of the blue wavelengths that signal your body that it’s daytime. What really matters is how much blue light in the 440–495 nanometer range is in the bulb you’re using. That’s the wavelength your biology responds to. It’s not just about warm or cool – it’s about the signals your biology is receiving from the energy wavelength.

Your eyes have special cells called ipRGCs that help set your body clock. These cells don’t help you see – they help your brain know what time it is. They’re most sensitive to blue light between 440–495 nanometers and use something called melanopsin to send signals to your cells (each cell has it’s own circadian rhythm). When the light is bright (blue light), they work with your regular eye cells to keep your body in sync with the day – causing you to feel alert.

Melanopsin is a special pigment inside the timing cells in your eyes. It helps your body tell time by sensing blue light between 440–495 nanometers. When it picks up that light, it sends signals to your brain to reset your body clock, control your pupils, and manage hormones like melatonin. It’s one way your body uses light to stay on schedule.

Full-spectrum lights work well during the day because they have lots of blue light, which helps you stay awake and focused. But in the evening, that same blue light can confuse your body and make it harder to sleep. Circadian lighting is different – it changes throughout the day to give your body the right kind of light at the right time, just like nature intended.

Yes. If you don’t get enough blue light during the day – or too much at night – your body clock can fall out of sync. Over time, this can lead to problems like weight gain, low energy, heart issues, or feeling down. Just like eating well and staying active, getting the right light at the right time helps keep your body healthy. This isn’t theoretical, it’s backed by decades of circadian science, and it’s been documented in over 25,000 peer-reviewed studies. The World Health Organization now classifies circadian disruption as a probable carcinogen. And Harvard researchers link nighttime blue light to cancer, diabetes, and metabolic disease.

Start your day with bright light. Getting at least 30 minutes of sunlight in the morning – or sitting by a sunny window – gives your brain a strong “daytime” signal. Ideally, you’ll be able to stay in or around this blue light during twilight hours. If you can’t get outside, being near bright indoor light with some blue in it can help set your body clock, too.

Not always. Light affects people differently depending on their age, genes, and sleep habits. Kids and early risers usually feel the effects of blue light more quickly. Older adults and night owls might need brighter or longer light to feel the same changes.

You can start feeling better in just a few days. Getting blue light in the morning and staying away from it at night (that means less screentime in the evening) helps your body get back on track. Most people sleep better and feel more awake within 3 to 5 days.

OIO is a smart light that helps your body feel awake during the day and ready to sleep at night. Unlike regular or smart bulbs that stay the same, OIO changes its light in real time to match what your body needs – more energizing light during the day, and calming light at night to help you wind down.

Wi-Fi and Bluetooth are required for full functionality in OIO Bulbs. In normal operation, OIO Bulbs use Wi-Fi to set their internal clocks, update their schedules, and receive commands from OIO App. Bluetooth is used primarily in setup to connect OIO Bulbs to your Wi-Fi network.

Your order comes with OIO Bulbs (choose A19 or BR30), an OIO Loop, a quick-start guide, and free access to OIO App on Apple or Android.

With the OIO App, scan the QR code on the bulb. Then just screw the OIO Bulb into any standard light socket, turn the light on, and follow in-app instructions to finish setup and make it your own.

To make our invisible technology visible, we created OIO Loop. When you look through it, you’ll see the hidden wavelengths of light that appears as a rainbow. With Loop, you can watch the appearance and disappearance of blue light, as OIO bulb shifts between day and evening modes. It’s a easy way to watch the science in action.

OIO Loop helps you see what type of light OIO Bulb is giving off, based on the settings in the OIO App (Day Mode, Evening Mode or Night Mode). Just hold Loop in front of your OIO bulb at an angle, then slowly raise or lower Loop until you see a rainbow stretched along the lens – those colors represent the light spectrum and show you the type of energy the bulb is emitting.

During the day, OIO Bulb gives off a full rainbow of light: violet, blue, green, yellow, orange, and red – mimicking the wavelengths of the sun. The strong blue helps your body feel awake and alert. At night, OIO Bulb shifts to Evening Mode and purposefully removes the blue light; just like what happens over the course of a day in nature. The OIO Loop will visualize this change and show an obvious gap during the evening where the blue in the rainbow disappears. This change helps your body know it’s time to relax and get ready for sleep.

Open the OIO App and tap the Add Light button (bulb icon with + sign) in the lower left, then scan the QR code on the OIO Bulb. Once scanned, screw the bulb into any standard light socket and turn it on. Go back to the App and follow in-app instructions to finish pairing.

Yes! OIO products can connect to Wi-Fi with any Matter-compatible app. Once connected to Wi-Fi, it automatically shifts between Day, Evening, and Night Modes based on circadian science. If you decide you want to explore OIO App, you can use the App to enhance control of OIO Bulb by managing your schedules or manually adjusting between modes based on your preferences or routines.

Yes! OIO works with Alexa, Google Home, and others smart home systems. You can use these systems along with OIO App – or without. It’s your choice.

For best results, start by installing OIO Bulbs in lights near your bed, where light impacts your circadian rhythm most, especially right after waking and in the three hours before sleep. From there, expand to other lights used at night and eventually install more throughout your home where you spend time before heading to your bedroom.

Setup is easy and takes about one minute per OIO Bulb. Be sure to read the installation guide before starting – following the recommended steps will make sure your experience is smooth and successful.

OIO Bulb helps your body stay on a healthy “sleep-wake” schedule. During the day, it gives off bright blue wavelengths – just like sunlight – to help you feel awake and alert. But at night, it removes those colors because they tell your brain it’s still daytime. Regular lights and screens use the same kind of light your body uses to wake up, which can make it hard to fall asleep. OIO Bulb purposefully removes those colors at night so your body knows it’s time to wind down, rest, and repair. Just like nature intended.

OIO Bulb changes modes on its own using a daily schedule. If you want control of your modes, use OIO App to schedule or manually adjust modes based on your preferences or routines.

Yes! You can set custom times for your lights to change modes in OIO App, or manually change whenever you want. You can also schedule when lights turn on or off, and adjust how bright they are or how warm or cool the color looks.

OIO Bulb is engineered to uniquely manipulate the light spectrum and remove blue wavelengths that cause wakefulness – giving your biology the signal to produce melatonin and wind down.

This breakthrough is the result of 10 years of research, more than 500 patents, and scientific work at the Nobel Laureate level.

OIO App works on most iPhones and Android phones. If your phone is fairly new, it should work just fine.

When you first set up OIO App, it will ask what time you want to wake up. Your selection sets the starting schedule. You can then fine-tune morning, evening, and night light settings for each room – and change anytime you’d like.

The OIO App gives you the right light at the right time by using the sleep schedule you selected when setting up the App. Day Mode provides brighter light during the day (blue) to help you feel alert, then shifts to Night Mode where those day mode wavelengths are absent, signals your body wind down so you can sleep.

Yes! OIO App lets you group bulbs by room and control them all at once – or you can select specific lights to control each on its own, or change the schedule in each room.

You can update the OIO App anytime through the Apple App Store or Google Play. Just search for “OIO” and tap “Update” if a new version is available.

OIO Loop is a small handheld tool that lets you see all the colors inside a light spectrum (the rainbow of colors), even the ones your eyes can’t normally detect. It helps you understand what kind of light you’re really getting.

Look through OIO Loop and point it above or below OIO Bulb, moving it until you see a rainbow of colors across the lens. In Day Mode, you should see a continuous band of colors, with the bright blue section being the waveolength that promotes wakefullness. In Evening Mode, there should be a clear gap where blue was when in Day Mode. That open space between the green and violet confirms the absense of blue light – which, just like nature – sends the signal to your biology that it’s time to wind down and prepare for sleep. The presense of blue signals Day Mode, the absense of blue signals Night Mode.

OIO Loop is completely separate from the App and is not an electronic device – therefore it doesn’t connect to the App. It’s a handheld tool you hold and look through to see the light spectrum (rainbow of colors) it doesn’t need to be paired or synced.

OIO Loop helps you see the light spectrum in your environment. Knowing what your light environment is will help you understand if the light you’re in is helping or hurting your boiological clock. Blue light is essential during the day to help you stay alert, but at night, you do’t want this wavelength around you because it signals your biology that it’s still daytime – encouraging wakefullness. Use your Loop to ensure there is an absence of blue light at night so your biology is getting the natural signals to winddown and prepare for sleep.

OIO Loop is not electronic – but it’s also not waterproof. Water or dust on the lens can leave residue or cause damage, which may affect how clearly it shows the light spectrum. To protect it, keep the lens dry and clean.

If the bulb appears in the app but won’t respond, start by power-cycling it at the wall switch. Wait about a minute, then try again in the App. If that doesn’t work, check if the bulb still functions by quickly toggling the power: turn it on for about a second, then off, then on again. This should trigger Evening Mode. If it lights up, try another power cycle to restore full App control. If the issue persists, contact OIO Support: 855-OIO-BULB or OIOcare@korrus.com.

If your OIO Bulb was paired with another system (like Alexa), you’ll need to use that system to put the bulb into pairing mode, then copy the code into the OIO App by tapping “Enter Pairing Code” when the QR screen appears.

If the bulb hasn’t been paired before, it should pulse between amber and white. This means it’s ready to connect. If it’s not pulsing, turn it off and back on. If it still stays solid white, do a factory reset as explained below:

– Turn the bulb off, then quickly on – just enough to see it light up – then off again.

– Repeat this 4 times.

– On the 5th time, turn it on and leave it on. The bulb will flash colors, starting with magenta, then turn off and back on by itself.

It should now be pulsing amber and white. If it is and still won’t pair, make sure Bluetooth is turned on, your OIO App is updated, and the app has Bluetooth permission. Still stuck? Contact support at 855-OIO-BULB or OIOcare@korrus.com.

Look through OIO Loop and with the lens vertical, point it above or below OIO Bulb, moving it until you see a rainbow of colors across the lens – do NOT point it directly at the bulb. Keep experimenting with the angle until you see the spectrum (rainbow of colors), these will appear as you’re tilting and moving OIO Loop above or below the light source.

Yes. You can reset OIO Bulbs two ways – through the app or manually using the power switch.

To reset using the OIO App:

1. Open the app and tap ‘”Control” on the home screen.
2. Select the room where the bulb is located.
3. Tap “Advanced Settings”, find your light, swipe left, and tap “Edit”.
4. In the Light Details screen, tap the menu in the upper right and choose “Delete Light”.
   This removes the bulb from your home and resets it so you can pair it again or assign new Wi-Fi.

To reset manually:

1. Turn the bulb “off”, then “on” briefly – just long enough to light up.
2. Repeat this 4 times.
3. On the 5th time, turn the bulb on and leave it on.
4. It should start flashing colors (starting with pink/purple), then turn off and on by itself.
5. Once it begins pulsing between amber and white, it’s ready to be paired again.

For order status, visit: Korrus.com/account/

For technical support or other help, visit: OIO Support

All OIO products come with a 1-year warranty starting from the date of purchase.

Visit OIO Support and fill out the support form to start your return or exchange.

We offer refunds for purchases made within the last 30 days. To start a return or exchange, use our support form at OIO Support.

No registration is required – your OIO Bulb is automatically covered under warranty.

We process orders quickly, but if you need to make a change, contact OIO Support as soon as possible. We’ll do our best to help before your order ships.