Your phone goes everywhere.
Take your light with you.

From morning messages to an evening with your tablet. SpectraFill™ Mobile brings a separate light source to your compatible phone or tablet, with a clip-on design and no app to install.

Presale price

Choose your pack

1 unit$99.002 units$179.003 unitsRecommended$259.005 units$399.00

See how it works

Will it fit my device?

Check the camera position and clip fit before ordering. The current product guidance specifies a rear camera at the top-left edge and recommends removing the case. Compatibility varies by device; this is not a universal fit.

Not sure about your model? Ask us about compatibility and include your device model and case.

Free shipping 30-day guarantee 24-month warranty

SpectraFill Mobile mounted on a phone, front view

SpectraFill Mobile mounted on a phone, rear clip view

It's not you. It's your light.

Your phone is part of everyday life. Reading, messages, video calls. SpectraFill™ offers a different way to think about your screen setup: adding a separate light source alongside the display settings you already use.

📖 Your tablet is where you read the news and your next book.
💼 Work moves from your desk to the phone in your hand.
💬 Messages and video calls keep you connected throughout the day.
🌙 Your screen is part of your evening routine, too.

A different approach to screen light: display settings change the light from your screen. SpectraFill™ is a separate light source attached to your device. It adds light; it does not filter the display or replace breaks from screen use.

Your existing habits

Display settings — adjust screen color
Blue-light glasses — filter incoming light
Screen breaks — time away from the display

→

What SpectraFill™ does

A separate clip-on light source
Selectable light modes
Works alongside your screen settings

Who It's For

Your screen. Your routine.
Find your fit.

Different screens, familiar moments. Start with how you use yours.

01 · Reading & connection

The tablet reader

The morning news, a novel on the sofa, a video call with family. For adults who make a tablet part of their everyday routine.

02 · Beyond the desk

The remote worker

Your workday moves between devices. For adults who want a clip-on light source for a compatible handheld screen as well as their desk setup.

03 · A considered setup

The light-conscious user

You already pay attention to lighting at home. Explore the modes and instrument readings to decide whether Mobile fits your setup.

04 · A thoughtful gift

The person buying for someone else

For a partner, parent or friend who enjoys their phone or tablet. Check their device and case before choosing a single unit or a pack.

Designed around compatible devices, not every device. Check the fit before you buy. Follow the product instructions and age restrictions.

Made for everyday use

A simple addition.
Three practical reasons.

A clip-on design

Attach it to a compatible device and keep your screen in hand. Check the camera position and case fit before ordering.

No app to install

A physical control keeps the setup simple. No account, pairing or extra app is needed to select a mode.

A choice of light modes

Choose between Full Spectrum, Night and Invisible. The mode changes the light from SpectraFill™; it does not change the light emitted by your screen.

Individual results vary. SpectraFill™ is a general wellness device for self-care use, not a medical device. Not intended to diagnose, treat, cure, or prevent any disease.

How It Works

The edges of the spectrum are where the biology happens.

Three charts. The dashed line is natural sunlight — the same reference in all three, so you can see exactly what your screen leaves out.

This is the sun.

One smooth, unbroken curve. Violet on one end, deep infrared on the other, nothing missing in between. This is the light your body spent every day of human history under.

Here's the part most people miss: the edges are the parts you can't see — and they're the most biologically active wavelengths in the whole spectrum.

This is your phone.

Three narrow spikes — blue, green, red. Just enough to fool your eye into seeing color. Put it against the sunlight curve and the gap is obvious: both edges are gone.

Your screen isn't broken. It was engineered to make color, not to feed biology. Nobody designed it to be the light you hold six inches from your face, hours a day.

This is your phone with SpectraFill™.

The edges come back. Deep violet on one side, near-infrared on the other — the exact wavelengths your phone leaves out, now tracking the shape of natural sunlight.

Wherever you're holding your phone starts to look, spectrally, a lot more like being outside — without changing a single thing about how you use it.

That's the whole idea. Put the edges back. Everything else on this page is just the detail of how.

One Button. Three Light Modes.

Your setting.
Your choice.

380–830 nm

Full Spectrum

The setting that uses all six wavelengths listed for SpectraFill™ Mobile, including violet, red and near-infrared.

Best for: daytime, video calls, everyday scrolling.

670 · 760 · 810 · 830 nm

Night

Red and near-infrared only. This mode changes the light from the accessory, not your screen. You can use it alongside your device’s night display settings; it does not remove blue light from the screen or guarantee better sleep.

Best for: evenings, late texts, reading before bed.

760 · 810 · 830 nm

Invisible

Near-infrared only, without the visible violet and red channels. No visible glow does not mean the device is switched off. Follow the product instructions.

Best for: bedrooms, movie nights, minimalist desks.

🔘 A long press cycles Full Spectrum → Night → Invisible. No app required.

The Data

Skeptical? Good. Here's the data.

SpectraFill™ Mobile measured with the OHSP-350IR. View the instrument readings below, or open either capture at full size.

OHSP-350IR spectral graph from 380 to 1050 nm — OHSP-350IR · Spectral distribution Open full-size image

OHSP-350IR readings: 4.21 lx, 46.8 microwatts per square centimetre, peak 384.7 nm and centroid 678.3 nm — OHSP-350IR · Instrument readings Open full-size image

Measurement	With SpectraFill™ Mobile
Illuminance	4.21 lx
Irradiance (total output)	46.8 µW/cm²
Peak wavelength	384.7 nm
Centroid wavelength	678.3 nm

Measured with an OHSP-350IR calibrated spectrometer. This is the measured output of the device itself — we don't have an equivalent "screen alone" baseline measurement to show a before/after delta for Mobile.

380 nm — studied in relation to eye growth signaling (Jiang et al., PNAS 2021)
405 nm — explored in metabolic light-response pathways (Nature Comms 2024)
670 nm — studied for color-contrast sensitivity (Shinhmar et al. 2021)
760 nm — near-infrared range studied in photobiomodulation research
810 nm — most studied NIR wavelength for cytochrome c oxidase (Karu 2010)
830 nm — deep NIR penetration studied in photobiomodulation literature

Why not just full-spectrum? Because dose matters. Sunlight is continuous; a device that clips onto your phone shouldn't be. SpectraFill™ delivers only the wavelengths with the most biological interest, at the lowest possible light dose — precision instead of brute force.

The studies cited describe research on specific wavelengths, not claims about this product. SpectraFill™ is a general wellness device for self-care use. Not intended to diagnose, treat, cure, or prevent any disease.

Setup

Clip on in seconds. No tools.

Hands clipping SpectraFill Mobile spectrum bar onto phone, close-up installation

Clip it on top

The spring clip fits over the top edge of your phone or tablet. Don't block the rear camera.

Press power once

One press turns it on. It's ready — no pairing, no app.

Charge via USB-C

Built-in rechargeable battery. About 4 hours for a full first charge.

📱 Fits phones with the rear camera on the top-left edge (most iPhones) 🔋 5V DC only — no fast chargers

⚠️ Not every phone works the same way — compatibility depends on where your rear camera sits. Check your model before buying.

Why We Built It

We make sunlamps. This is the one we use most.

"Mitolux has spent years building spectrometer-calibrated light devices — tools people stand in front of for ten minutes a day. Then we looked at our own phones. Ten minutes of good light, followed by hours of the worst light in the house, held six inches from our faces. SpectraFill™ Mobile is our answer: not another device to remember, but the missing spectrum clipped onto whatever screen is actually in your hand. Wherever you are."

Gerardo Gutiérrez Founder, Mitolux

The Offer

Choose your pack.
Keep it simple.

SpectraFill Mobile spectrum bar — 1 unit

SpectraFill™ Mobile · Presale

$99.00

Pre-Order — $99.00

30-day guarantee · 24-month warranty.
Read the buying questions below.

Will it fit my device?

Not sure about your model? Ask us about compatibility and include your device model and case.

Each device includes:

📱 1× SpectraFill™ Spectrum Bar™
🔌 USB-C cable
📄 Quick Start Guide
🛡️ 24-month warranty

More than one screen in the house? Save more.

Duo Pack · 2 units

$179.00$298.00

$89.50 per unit

Pre-Order 2 →

For sharing SpectraFill™ Mobile / Family Pack — 3 Units

Family Pack · 3 units

$259.00$447.00

$86.33 per unit

Pre-Order 3 →

Squad Pack · 5 units

$399.00$745.00

$79.80 per unit

Pre-Order 5 →

Outfitting a team? 10+ units, custom pricing → support@mitolux.com

Before You Decide

Questions people ask before buying

Will this work with my phone?

SpectraFill Mobile fits phones and tablets with the rear camera on the top-left edge (most iPhone models). Check your model's camera position before buying — it won't clip correctly if the camera is centered or on the right side.

Is it safe to have it clipped on all day?

SpectraFill™ Mobile is designed for continuous low-dose use, within the range of a bright indoor environment. If you take medication that increases light sensitivity or have a medical condition, check with your doctor first.

Does it work with a phone case on?

We recommend removing your case before clipping it on, for the most secure and stable fit.

I already own SpectraFill For Monitor. Why get this too?

Because your desk isn't the only place you're on a screen. Monitor stays plugged in above your display; Mobile runs on battery and clips onto whatever's actually in your hand — the couch, the kitchen, the airport gate.

Why can't I see the near-infrared?

Because human eyes can't. 760, 810 and 830 nm sit outside the visible range. In Invisible mode the bar looks switched off while those channels keep running.

Do I need to charge it separately?

Yes — it has a built-in rechargeable battery, charged via USB-C. A full charge takes about 4 hours. It does not operate while charging; unplug before use.

Who shouldn't use this?

Keep away from children under 12. If pregnant, on light-sensitizing medication, or managing a medical condition, check with a health professional before use.

What if it doesn't work for me?

Use it for 30 days. If you don't notice a difference, send it back for a full refund — no fine print.

Warranty?

24 months, limited, from Preferred Mitolux Inc.

Still unsure? 30-day guarantee. Try it wherever you actually use your phone — if it doesn't help, send it back.

SpectraFill™ Mobile

Your phone forgot the light. You don't have to.

Six wavelengths your screen leaves out. Three modes for the three times of your day. Seconds to clip on. Nothing to remember.