How Close Should You Stand to a Red Light Therapy Panel?

Published October 2026. Updated October 2026.

Start with the manual, then with a listed distance

There is no single correct distance that fits every panel. Each device has its own LED layout, its own power and its own spec sheet. The distance that matters is the one in your manual, and the numbers that matter are the ones published for that distance. If you are not sure what an irradiance figure is, read what irradiance means first.

For AWA panels, the stated irradiance at each listed distance is in the FX300 and FX500 irradiance specs guide. Choose one of those distances rather than guessing between them. A distance with a published number lets you check your session with arithmetic. A distance without one leaves you estimating.

What changes when you move closer or farther

Three things shift together when you change your gap to the panel: the irradiance, the area the light covers, and how forgiving the setup is when you sway or lean.

• Irradiance: the power landing on each square centimeter. It rises as you move in and falls as you move out.
• Coverage: up close, the lit patch is about the size of the panel face. Farther back, the light spreads over a wider area, with each part of it getting less.
• Tolerance: at close range a small movement changes the number a lot. At a longer range the same movement changes it much less.

The tolerance point is easy to check with AWA's published numbers. The FX300 lists 220 mW/cm² at 1 inch and 145 mW/cm² at 2 inches. Moving back one inch cuts the stated figure by about 34 percent. Between 6 and 12 inches the drop is about 48 percent, but spread across six inches of movement.

Stated irradiance change when you move back

Figures are AWA stated numbers. Percentages are our arithmetic from those numbers. Nothing here is a recommended distance.

Matching your time to your distance

If you change distance, the time your manual gives no longer lines up with the same energy. The dose formula is J/cm² = mW/cm² x seconds / 1000. Here is an arithmetic comparison for the FX500, using its stated numbers.

• 6 inches, 10 minutes (600 seconds): 94 x 600 / 1000 = 56.4 J/cm².
• 12 inches, 10 minutes: 73.8 x 600 / 1000 = 44.3 J/cm².
• 20 inches, 10 minutes: 58.6 x 600 / 1000 = 35.2 J/cm².

These are calculations only. Session time comes from the manual. If you want to try your own numbers, use the dose calculator or read the dose formula guide.

A simple way to choose where to stand

1. Open the manual and note any distance or range it names.
2. Find the nearest distance with a published irradiance figure.
3. Check your space: can you hold that distance without leaning or bracing?
4. Measure it with a tape from the LED surface to the skin you are aiming at.
5. Mark the spot, so the next session starts at the same gap.
6. Use the same distance for a few weeks so your sessions are comparable.

Think of the distance as a setting, like a dial position. The aim is to use the same setting each time, so any change between sessions comes from the time you set and not from drift in where you stood. If several people share the panel, leave the floor marker in place and write the distance on the tape so everyone starts from the same spot.

Common mistakes

• Standing close because "more is better". A higher number on the meter is not a goal.
• Using a figure stated at one distance while standing at another.
• Estimating distance by eye. A few inches of error is large at close range.
• Measuring from the wall or the frame, not the LED surface.
• Drifting closer as the session goes on, especially when sitting.
• Ignoring the manual's time because the distance changed.

Before you use any light device: read the label, follow the device manual, and use eye protection as directed. For medical questions, speak to a qualified health professional first.

Related guides in this series

• What irradiance means on a spec sheet
• AWA FX300 and FX500 irradiance specs
• Dose formula: irradiance, time and energy
• How long a session runs, by the manual
• Irradiance by distance chart

This post is part of our distance and placement series. For the overview, see the red light therapy distance guide.

Device pages

Read the full page and label for each device before you use it: AWA FX300 panel and AWA FX500 panel. You can also browse AWA panels.

Frequently asked questions

How close should I stand to a red light panel?

As close as your manual says, and at a distance that has a published irradiance figure. Our panels list figures at set distances so you can check your setup with arithmetic.

Is closer always stronger?

Closer gives a higher stated irradiance, but a smaller lit area and less room for error. Stronger is not a goal in itself. Your manual sets time and distance.

What if my distance is between two listed ones?

Regard the figure as an estimate somewhere between the two published numbers, or move to a listed distance so you can calculate with real numbers.

Do I measure from the panel frame or the LEDs?

Measure from the LED surface to the skin you are aiming at, which is how spec sheets are stated.

Should I change my session time if I change distance?

Distance changes the energy a given time delivers, as the arithmetic above shows. Follow the manual for time and distance, and ask a qualified professional about medical questions.

Sources

• FDA: General Wellness policy for low risk devices. January 2026 guidance describing general wellness products as low risk products that promote a healthy lifestyle. It is a policy document, not a statement about any one device.
• FDA: Laser Products and Instruments. Explains laser hazard classes I to IV and labeling, and notes that LEDs are not subject to the federal laser product performance standard.

Regulatory note: select devices carry FDA 510(k) clearance for specific, limited uses. Most light devices are sold as general wellness products. Read each product page and label.