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[2] Chung H, Dai T, Sharma SK, Huang Y-Y, Carroll JD, Hamblin MR. The nuts and bolts of low-level laser (light) therapy. Annals of Biomedical Engineering. 2012.

Not all natural light is created equal; different wavelengths and colors within the light spectrum have different effects. And it’s hardly a secret which wavelengths are effective for light therapy. Extensive research has shown that only a relatively narrow band of red and near infrared wavelengths impact your cells and have a significant therapeutic effect.

That’s another problem with infrared heat lamps: the light power that’s delivered drops off a great deal as you move further away from the light—even though they get hot enough to burn you, which obviously isn’t good!

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Less than 1% of the energy from infrared lamps is delivered from 600-660 nm, and only about 2% is delivered in the entire 810-880 nm range. In total, these wavelengths only represent about 3% of the total energy delivered by an infrared heat lamp bulb. In other words, 97% of wavelengths from an infrared heat lamp fall outside of the wavelength range known to produce the greatest health benefits.

Light is also partially polarised when it bounces off a shiny surface. For example, the light that reflects off a horizontal surface, such as a puddle, is mostly horizontally polarised. Polarised sunglasses are usually vertically polarised to reduce the glare from puddles or wet roads.

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Translation: infrared heat lamps deliver mostly ineffective wavelengths of light that don’t have any real effect on human health.

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Are red light therapy devices different from infrared (IR) heat lamps? Yes, a lot different, and one of the big reasons is right in the name: heat.

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But 'up' and 'down' are not fixed directions. The vibrations could be vertical, horizontal, or at any angle in between. In fact, the waves that make up sunlight, for example, are evenly distributed across all angles.

There’s also a reason medical researchers use LEDs or lasers when they conduct photomedicine research. You won't ever find them using heat lamps, which use ineffective wavelengths, don’t offer clinical power or short treatment times, can’t match Joovv’s coverage or consistency, and come with the added dangers of burns.

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The graph below shows the irradiance of four 250-watt infrared heat lamps. Because they’re hot to the touch, you need to be at least 18” away, but at that distance, the irradiance is only about 1 mW/cm2. With this type of power, you’re going to need hours to receive a meaningful dose of energy. Who has that much time every day?

When you break down the scientific research on power and wavelengths, it’s easy to see that heat lamps really don’t compare to a full-body red light therapy device like a Joovv. There’s a reason you can pick up infrared heat bulbs at your local hardware store for less than $10. They simply can’t deliver the clinical benefits of a real red light therapy device, and they come with too many risks.

In addition to infrared heat lamps delivering inferior wavelengths, they don’t offer medical-grade power like a high quality LED light therapy device.

What are the ideal wavelengths for light therapy? Red wavelengths (600-660 nanometers) and near Infrared wavelengths (810-880 nm). These narrow ranges fall within the “therapeutic window”, a term used by photomedicine researchers to describe the band of wavelengths that have the greatest positive effect on cellular biology. Other wavelengths have limited effectiveness, at best. [2] You can learn more about the basics of light, wavelengths, and colors here.

Some animals can see in polarised light, including the fiddler crabs and mantis shrimp in David Attenborough's Life in Colour.

Infrared heat lamps produce a wide range of wavelengths, but as the graph below shows, the wavelength curve builds to its peak output around 1100 nm. [3]

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*Joovv light therapy products are intended to provide topical heating for the purpose of elevating tissue temperature for Temporary relief of minor muscle pain, Joint pain, Minor arthritis pain, Muscle spasms, Temporary increase in local blood circulation, Temporary relaxation of muscles. These products are not intended to diagnose, cure, or prevent specific diseases of medical conditions. The Joovv website is for education and information purposes only and is not intended as medical advice or a substitute for medical advice. Joovv, Inc does not intend these products to cure any physical, skin, or mental conditions solely from their use. A qualified health professional should always be consulted prior to using the products, and professional medical attention should be sought with regard to any serious or life-threatening conditions | ©Joovv, Inc. 2016-2024

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Heat lamps are designed to induce heat stress on a user. The heat is the point. The problem is that excess heat can potentially cause damage to your skin. By contrast, high-quality LED light therapy devices—like Joovv—give off very little heat, and have been found safe, effective, and free of side effects in numerous clinical trials. [1]

If you’re looking for high quality red light therapy that supports better cellular function and greater balance, check out a Joovv.

Even if heat lamps could deliver clinical results similar to light therapy, the burn risks aren’t worth it. Beyond the heat dangers, infrared heat lamps simply don’t offer the clinically-proven wavelengths or medical-grade power output of a high-quality LED device, which we’ll explain in more detail throughout this article.

The distance you are from the device. The farther you are, the less energy you’ll receive, and you have to be far away from a heat lamp to avoid burn risks. Joovv can treat a person up to 24 inches away from the device, whereas with other light therapy brands, you need to be very close to the device to see any potential benefits.

The size of the device matters too. With clinical light therapy, coverage and consistency are key. You can only get optimal benefits and short treatment times from a full-body device like a Joovv. Infrared heat lamps can’t match Joovv for size or coverage, in addition to lacking in power and wavelengths.

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The total power output—sometimes referred to as irradiance—from a device also directly impacts the time required for treatments. Lower-powered products like heat lamps take way longer to produce benefits, if ever. Imagine filling up your water bottle from a dripping faucet—it will fill up eventually, but you’ll waste a lot of time in the process. You can read more about how to accurately measure light therapy power here.

[1] Avci P, Gupta A, et al. Low-level laser (light) therapy (LLLT) in skin: stimulating, healing, restoring. Seminars in Cutaneous Medicine and Surgery. 2013 Mar.

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Light can be polarised by passing it through a polarising filter. A polarising filter has all its molecules aligned in the same direction. As a result, only waves with vibration aligned in the same direction can pass through.

Imagine holding a skipping rope so that it passes between the posts of a picket fence, and waving it up and down. The vertically aligned waves will be able to pass between the gap in the fence posts. But if you wave it from side to side, the waves will be blocked.

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Light is a transverse wave: the wave is S-shaped, with the curves of the S at right angles to the direction it travels. Essentially, the wave vibrates up and down as it travels forwards.

Since only a small selection of the waves can pass through a polarising filter, the overall intensity of the light is reduced. This is why sunglasses can be polarised: to reduce brightness and glare without compromising your vision.