How long should you stay in a red light therapy bed?

Dose is irradiance multiplied by time. If a bed delivers a high irradiance at the body plane, you reach a useful dose quickly; if it delivers less, you need more minutes for the same dose.

That's why session length is a property of the specific bed. Two beds with the same session recommendation can be delivering very different doses, and two beds with the same dose can call for very different times.

Ask any manufacturer for irradiance at the body plane and the dose their recommended session delivers. If they can give you both, their session length means something.

High-output commercial or medical-grade bed: roughly 8–12 minutes, often per side if the bed isn't a full surround.

Mid-tier home bed: roughly 12–20 minutes, again sometimes per position.

Lower-output mat or soft bed: 20 minutes or more, and coverage is usually partial, so expect to reposition.

In all three cases, treat the manufacturer's figure as a ceiling and start at the lower end for your first week.

Skin: stay within the recommended range and prioritise frequency. Longer sessions don't accelerate skin remodelling.

Recovery: the standard session length is fine; timing relative to training matters more than adding minutes.

Aches and stiffness: some people run slightly shorter sessions more often rather than long ones occasionally, which is generally the better trade.

Sleep: keep sessions moderate and finish 30–60 minutes before bed.

Skin that stays red for hours, a feeling of being drained rather than relaxed, headache, or heat that reads as genuinely hot rather than warm.

Any of those is a cue to cut minutes, not to push through. Sessions that feel comfortable are the ones people keep doing, and frequency is where results actually live.