Red Light Rising Target Light 670 Handheld Red Light Therapy Device

670nm sits very close to the peak absorption point of cytochrome c oxidase, a key enzyme involved in cellular energy production. This wavelength gained widespread attention following the UCL research by Professor Glen Jeffery, which explored its potential role in supporting retinal cell function.

In practice, neighbouring wavelengths like 630nm and 660nm also perform well for skin and eye wellness, and there is strong published research supporting all three.

The reason 670nm became our most requested single wavelength device is largely because of the visibility and credibility of that particular study. If your goal is primarily skin care or general red light therapy, any of our devices using red wavelengths in the 630nm to 670nm range may support your needs.

The Target Light 670 emits visible red light at 670nm, which is a wavelength that has been used in published eye wellness research.

For face and eye sessions, we recommend positioning the device anywhere from 20cm to 65cm away from your face, with eyes open or gently closed, whichever feels most comfortable for you. Closer distances deliver higher irradiance for skin care, while further distances provide a gentler exposure suitable for general eye comfort.

Each session should last 5 to 10 minutes. If you experience any discomfort, simply increase the distance or shorten the session time.

The device has been independently tested for flicker by the UK Lighting Industry Association and confirmed as flicker free, which is particularly important for use near the eyes.

If you have specific eye concerns or pre existing conditions, we recommend consulting a healthcare professional before starting.

Each device in the Target Light range is designed for a different use case.

The Target Light 670 is a single wavelength device (670nm red light only) designed primarily for face, eye comfort, skin care, and sleep support. It is mains powered via an E27 screw fitting, lightweight at 300g, and is our most affordable handheld device at £119. It is ideal if you want a simple, focused red light therapy routine without near infrared wavelengths.

The Target Light 2.0 adds a second wavelength — 660nm red and 850nm near infrared. The near infrared wavelength penetrates deeper into tissue, which means it may provide support for joints, muscles, and deeper cellular wellness in addition to the surface level skin and eye benefits. It is also mains powered and is a good choice if you want both red and near infrared light in a single handheld device.

The Target Light 3.0 is our most advanced portable handheld. It features three wavelengths (660nm, 810nm, and 850nm), a rechargeable lithium ion battery, touchscreen controls for brightness and wavelength selection, and comes with an adjustable stand and carry case. It is designed for people who want maximum versatility and portability.

The Target Light 4.0 is a professional grade spotlight designed for clinics, wellness centres, and advanced home users. It delivers 660nm red and 850nm near infrared light at significantly higher irradiance than the handheld devices, with a built in adjustable floor stand, touchscreen, and remote control. It is the most powerful device in the range and is suited to hands free, targeted treatments.

For larger coverage areas like your full back, legs, or torso, we recommend exploring our Advantage red light therapy panels.

Yes. The 670nm wavelength may support general skin wellness anywhere on the body. You can use it on your neck, chest, hands, or any area where you would like to support skin wellness.

However, because the Target Light 670 only emits visible red light and does not include near infrared wavelengths, it is not designed for deep tissue support.

If you are looking for a handheld device that may also support joints, muscles, or deeper tissue wellness, consider the Target Light 2.0 or the Target Light 3.0, both of which include near infrared wavelengths.

Flicker refers to rapid, often invisible fluctuations in light output caused by the way some LED devices handle electrical current. Even when flicker is not visible to the eye, it can contribute to eye strain, headaches, and general discomfort, particularly during close range facial use.

The Target Light 670 has been independently tested by the UK Lighting Industry Association and confirmed as flicker free, with a flicker index of 0. This is especially important for a device designed to be used near the face and eyes.

Many competitors do not publish flicker data at all, so if you are comparing devices, we recommend asking for independently verified flicker test results.

All irradiance figures for the Target Light 670 were measured by the Lighting Industry Association (LIA) Laboratory in the UK, an independent accredited testing facility.

The testing was conducted using a Bentham IDR300 double monochromator to standard EN 62471:2008, and the full results are published in LIA Report L19724A.

We provide irradiance readings at six distances from 10cm to 67cm so you can see exactly what the device delivers at your preferred treatment distance.

Many red light therapy brands publish only a single irradiance figure at one distance, often measured in house. We believe independent, multi distance testing gives you a more honest and complete picture of what you are buying.

At 15cm treatment distance, the Target Light 670 measures 0.2 mG magnetic field and 128 V/m electric field using a TriField TF2 EMF meter.

The magnetic field — which is the primary EMF measurement most people are concerned about — is excellent at 0.2 mG. That is well under the Building Biology "no concern" threshold of 1 mG.

The electric field reading of 128 V/m is the highest of any device in our range. We want to be upfront about that. This is caused by the less shielded power supply design in this entry level handheld. To put it in context, typical household electric fields range from 1 to 100 V/m in most living spaces, but can spike to several hundred V/m at close range to unshielded wiring, chargers, and certain appliances. The TL 670's reading falls within this range. It does not indicate a safety concern — the device operates well within regulatory limits — but if you are specifically trying to minimise electric field exposure, the battery operated Target Light 3.0 produces zero detectable EMF across all measurement modes.

It's worth bearing in mind that every electronic device you use in daily life produces some level of EMF — your phone, your TV, your kettle, your fridge, your Bluetooth headphones, your fitness tracker. EMF is a normal part of modern life and virtually impossible to avoid entirely. The additional EMF exposure from a red light therapy session is small in the context of everything else you're already exposed to, and we believe the wellness benefits of consistent use far outweigh any concern about the modest EMF levels involved.