How to Use Red Light Therapy: Timing, Distance and Session Length

Red light therapy is one of the more straightforward wellness tools to add to a routine but there are a few variables that make a meaningful difference to your results. Getting the distance right, choosing the correct session length for your goal and building a consistent frequency are the three things that separate people who see real results from people who try it for two weeks and give up. Here is everything you need to know to use it correctly from day one.

What do you need to do before a red light therapy session?

Start with clean bare skin. This is the single most important preparation step and the one most people skip. Any product sitting on the surface of your skin, including moisturizer, SPF, foundation, serum or oil, creates a barrier that reduces how effectively the light reaches your cells. Remove everything before your session and apply your skincare products afterward.

Have your goggles ready. The Red by Heisen Blue Tabletop Panel includes protective goggles in the box. Wear them for face sessions or whenever you're up close. For body sessions further back they're optional, just don't look straight into the LEDs.

Plug in the panel. The panel plugs directly into a standard outlet, so there is nothing to charge.

Position yourself comfortably. Set yourself up at the correct distance from the panel before starting the timer so you're not adjusting mid-session.

How far should you be from a red light therapy device?

Distance is one of the most important variables in red light therapy because irradiance, the amount of light energy reaching your skin, drops as distance increases. The further away you sit, the less light reaches your skin per minute.

For the Red by Heisen Blue Tabletop Panel, the recommended distance is 6 to 12 inches from the skin. At about 5.5 inches, the manufacturer's readings show 76.5 mW/cm² of red and 59.7 mW/cm² of near infrared.

Here is the trade-off worth understanding: closer to the panel the irradiance is highest but the coverage area is narrower, meaning the light is concentrated on a smaller area directly in front of the panel. If you want to cover more of your body in a single session, sit further back, up to about 12 inches, which widens the coverage area. However, because irradiance drops with distance, you will need to extend your session time to receive the same total light dose. As a general guide, a 10 minute session at 6 inches becomes closer to 15 to 20 minutes at 12 inches. For targeted recovery on a specific muscle group or joint, stay close at around 6 inches. For broader coverage, sit further back and extend your session time accordingly.

How long should a red light therapy session be?

Session length depends on your goal.

For skin benefits: A 10 minute session is well suited to daily maintenance, tone and texture work. A 20 minute session delivers a higher total light dose and is better suited if you're targeting more specific concerns like firmness, deeper tissue support from the 830nm wavelength or accelerating results during an initial intensive phase.

For targeted recovery: A 10 to 15 minute session per target area is appropriate for pre-workout priming or light maintenance work. A 15 to 20 minute session is better for post-workout recovery targeting worked muscle groups or for joint support on a specific area.

The general principle is this: more time at the correct distance means more total light dose delivered. Longer sessions are not inherently better beyond a certain point since cells can only absorb so much light energy at once, but within the ranges above, more time consistently produces better outcomes than less.

How often should you use red light therapy?

Three to five sessions per week is the minimum frequency supported by the research for meaningful results across skin, recovery and healthy aging goals. Daily use is safe and well tolerated and for people focused on accelerating results, daily sessions produce compounding benefits faster than every-other-day use.

The honest answer is that the best frequency is whichever one you can sustain consistently over months. A person using their panel every single morning for 10 minutes will see better long term results than someone doing 30 minute sessions twice a week with long gaps in between. Consistency over time is the variable that matters most.

Is it better to use red light therapy in the morning or evening?

Both work and the research does not strongly favor one over the other for most applications. The choice should come down to which time slot you are most likely to use consistently.

Morning use works well for skin-focused sessions since you're already going through a skincare routine. It also pairs well with a pre-workout protocol if you train in the morning. Some people report feeling more alert and energized after a morning red light session, which makes it a natural addition to a morning routine.

Evening use is popular for people who want to wind down with a relaxation-oriented session and pairs well with an evening skincare routine. There is no evidence that red light therapy disrupts sleep and unlike blue light exposure it does not suppress melatonin, so evening use is completely fine.

For recovery specifically, the research most commonly studies post-workout application which for many people falls in the afternoon or evening after training.

How do you use the Red by Heisen Blue Tabletop Panel?

1. Stand the panel on its kickstand on a table or desk.
2. Plug the panel into a standard wall outlet.
3. For face or close-up sessions, put on the included goggles. Further back or on your body they're optional, just don't look straight into the LEDs.
4. Position yourself 6 to 12 inches from the panel surface: closer for a target area, further back for broader coverage.
5. Press the power button on the control panel to turn on the LEDs.
6. Use the TIME button to cycle through session lengths: 10, 15, 20 or 30 minutes.
7. Use the RED/NIR button to choose your channel: Red only, NIR only or both channels combined.
8. The panel will automatically switch off when the session ends.

When to use Red only vs NIR only vs combined: Red light only (630nm and 660nm) is best for surface skin work and general tone. NIR only (810nm, 830nm and 850nm) is best for deeper tissue recovery, joint support and circulation. Combined is the most versatile setting and is what most people use for general wellness and recovery sessions.

Coming later: a Red by Heisen Blue Face Mask and Large Panel. We'll add instructions for those here when they launch.

Can you use red light therapy with other skincare treatments?

With a regular skincare routine: Yes. Apply red light therapy to clean bare skin before any products. Follow your session with your usual serum, moisturizer and SPF.

With retinol or vitamin A: Yes, but timing matters. Use red light therapy first on clean skin, then wait a few minutes before applying retinol. Some people find that red light therapy enhances the tolerability of retinol by supporting the skin barrier, but always introduce new combinations gradually.

After microneedling: Wait 24 hours after a microneedling session before using red light therapy at home. After that window, consistent red light use in the days following microneedling actively supports the collagen-building and healing response and is commonly recommended by practitioners.

After Botox: Wait 24 to 48 hours after Botox before resuming red light therapy on the treated area. After that window, red light therapy is compatible with Botox and many practitioners recommend it to maintain skin quality between injection appointments.

With chemical exfoliants (AHAs, BHAs): Use red light therapy on clean skin before applying any exfoliant, or on days when you are not using a chemical exfoliant to avoid layering too many active treatments at once on sensitive skin.

With vitamin C serums: Compatible. Apply vitamin C after your red light session, not before, to keep the treatment surface clean during the session.

What are the most common mistakes people make with red light therapy?

Using it over products. The number one mistake. Moisturizer, SPF and even water-based serums on the skin surface reduce light penetration. Always use on clean bare skin.

Sitting too far away from the panel. Many people position themselves at arm's length or further out of caution. Past 12 inches, the irradiance is a fraction of what it is at 6 inches and the dose per session drops significantly. Get closer.

Using it once or twice and expecting results. Red light therapy works through cumulative cellular stimulation over weeks and months. Two sessions will not produce visible results. Eight weeks of consistent use very likely will.

Looking straight into the LEDs. The LED intensity at close range is not comfortable or safe for unprotected eyes during a full session. For face and close-up sessions, always wear the included goggles. Near-infrared light is invisible, so your eyes can't tell how strong it is.

Stopping too soon. Most people who quit do so in weeks three or four before the meaningful results have had time to develop. Collagen remodeling and mitochondrial adaptation take time. Take a photo before you start and commit to 8 weeks before evaluating.

Using it on skin with active photosensitizing medications without checking with a doctor. Some medications including certain antibiotics and acne medications increase photosensitivity. If you are taking any medication that affects light sensitivity, check with your doctor before starting.

What should you realistically expect and when?

Weeks 1 to 2: Skin may feel more hydrated and look slightly brighter. For recovery users, post-workout soreness may feel reduced. The routine is establishing itself.

Weeks 3 to 4: Early improvements in skin texture and tone become noticeable. Recovery between training sessions feels faster.

Weeks 6 to 8: More meaningful changes in skin firmness and complexion. Joint stiffness improvements become apparent for consistent users targeting specific areas.

Weeks 10 to 12 and beyond: Cumulative results from consistent use. This is where the compounding effect of daily or near-daily sessions becomes most visible and where most people become committed long term users.

What's next?

For a deeper look at the skin benefits, read can red light therapy really improve your skin. For recovery and longevity, start with red light therapy for recovery and healthy aging. And if you're brand new to the concept, our beginner's guide to red light therapy covers the fundamentals. Ready to start? Join the waitlist for the Red by Heisen Blue Tabletop Panel to get first access.

Frequently asked questions

How long does it take to see results from red light therapy? Most people notice early improvements in skin texture and hydration within two to four weeks of consistent use. More significant results in firmness, tone and collagen density typically become visible between six and twelve weeks. Recovery benefits like reduced soreness can be felt sooner, often within the first two weeks of consistent post-workout use.

Can you use red light therapy every day? Yes. Daily use is safe and well tolerated for most people. The panel is designed for regular repeated use and daily sessions produce compounding results faster than less frequent use. If you are new to red light therapy, starting with three to four sessions per week and building to daily use is a reasonable approach.

How close should I be to a red light therapy panel? 6 to 12 inches from the skin surface is the recommended distance for the Red by Heisen Blue Tabletop Panel. Moving further away reduces the dose delivered per session.

Do I need to wear eye protection during red light therapy? For face and close-up sessions, yes. The Red by Heisen Blue Tabletop Panel includes protective goggles in the box. Further back or on your body, goggles are optional as long as you don't look straight into the LEDs. Near-infrared light is invisible, so when in doubt, wear them.

Can I use red light therapy while pregnant? Pregnant women are generally advised to avoid red light therapy on the face and body as a precaution. The research on red light therapy during pregnancy is limited and caution is the appropriate position until more data is available. Check with your healthcare provider before using any light therapy device during pregnancy.

Is it safe to use red light therapy on broken or irritated skin? It is best to avoid using red light therapy directly over broken skin, open wounds or actively inflamed skin conditions until the area has healed. Red light therapy is generally used as a maintenance and support tool rather than an acute treatment for broken skin.

Can I use red light therapy before bed? Yes. Unlike blue light, red and near infrared wavelengths do not suppress melatonin and do not interfere with sleep. Evening sessions are a popular choice for people who want to incorporate red light therapy into a wind-down routine.

This article is for informational purposes and is not intended as medical advice. The Red by Heisen Blue line is designed for personal wellness use.