Sun & Skin
Tanning bed UV index: how strong is a sunbed really?
Sunbed vs sun: the numbers
| Source | UV-index equivalent | Fair skin burns in |
|---|---|---|
| Cloudy summer day | 3–5 | 30–50 min |
| Clear midday summer sun (Europe/US) | 7–9 | 17–22 min |
| Midday tropical sun | 10–12 | 12–15 min |
| Typical tanning bed | ~12+ | 10–13 min |
The comparison actually flatters sunbeds, because their output is heavily skewed toward UVA — the wavelength that penetrates deepest, ages skin fastest and drives melanoma risk, while producing almost none of the vitamin D that UVB does. You get the damage profile of extreme sun without the one benefit.
What the health agencies say
The WHO's cancer research agency (IARC) classifies UV-emitting tanning devices as carcinogenic to humans (Group 1). Using sunbeds before age 35 raises melanoma risk by roughly 75%, and several countries have banned commercial sunbeds outright. There is no "controlled dose" advantage: the dose is simply very high, every session.
The honest alternatives
If the goal is colour: outdoor tanning in the UV 3–5 window (typically mid-morning or late afternoon — check the hourly curve for your city) builds a slower but more even tan at a fraction of the dose. And a gradual self-tanner like Jergens Natural Glow delivers the same evening glow at exactly zero UV. Whatever you choose, know your personal limits with the burn-time table — or the live calculator.
Frequently asked questions
How high is the UV index in a tanning bed?
Equivalent to UV 12 or higher - stronger than midday tropical sun - delivered mostly as UVA. Ten minutes in a bed roughly matches the burn dose of 15-20 minutes of extreme midday sun on fair skin.
Is 10 minutes in a tanning bed like 10 minutes in the sun?
No - it's closer to double. A typical sunbed session delivers a burn-relevant dose comparable to midday tropical sun, which most people would never sit in unprotected.
Are tanning beds safer than the sun because they're controlled?
No. The WHO classifies sunbeds as Group-1 carcinogens. The 'control' sets the dose at extreme-sun levels; sessions before age 35 raise melanoma risk by about 75%.
Do tanning beds give you vitamin D?
Barely. Vitamin D is made by UVB, and sunbeds emit mostly UVA. Brief outdoor sun at moderate UV is far more effective.
What's the best alternative to a tanning bed?
Outdoor tanning at UV 3-5 with SPF 30 for gradual colour, or a self-tanner for instant colour with zero UV.
Live index, burn time for your skin type, and the best hours to be outside.
Sources & further reading