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How to fit a sauna light

Updated: October 2026

You are cladding a new cabin, or you have found a melted shade, and you need to know how to fit a sauna light without treating it as a plug-in lamp. The ten amazon.co.uk listings in the [sauna lamp comparison](/hub/steam-baths/sauna-lamp) are fixed fittings. None arrives with a BS 1363 plug, and the cable and the switch are part of the job. By the end you should know which choices are yours before the timber closes, and which ones pass to an electrician once the room already has a sauna heater. This is not a lab test. A qualifying purchase can earn a commission at no extra cost to you.

You are cladding a new cabin, or you have found a melted shade, and you need to know how to fit a sauna light without treating it as a plug-in lamp.

Our top picks

EVTSCAN EVTSCAN sauna light

Best overall

EVTSCAN EVTSCAN sauna light
7.9/10about £22.99
View offer
Mumusuki Mumusuki oval plastic shade

Alternative

Mumusuki Mumusuki oval plastic shade
7.5/10about £22.43
View offer
Duokon Duokon oval PP shade

Alternative

Duokon Duokon oval PP shade
7.7/10about £24.92
View offer
On this page
  1. 1.Decide the position before the cladding closes
  2. 2.The cable and the switch are not in the box
  3. 3.When the job is notifiable
  4. 4.Stop if the cover has melted

Decide the position before the cladding closes

You can still choose where the light sits while the frame is open, and that choice is harder once the boards are on. In the installer explainers of BS 7671 Section 703, zone 1 is the sauna heater and the space out to 0.5 m around it, and that volume does not get a lamp. Zone 3 is the upper part of the cabin, and equipment there has to withstand 125 °C. Measure the heater outline on the wall, mark 0.5 m, and keep the fitting outside it. The cable is better on the cold side of the insulation, so the route has to be agreed before the cladding hides it. The splash minimum and the rest of the zone split are on the sauna lamp IP rating page.

The cable and the switch are not in the box

None of these shades lists a length of heat-resistant flex as included, so the connection is not a fitting you finish with a plug. The EVTSCAN file is the clearest case in this set. The only UK review says there is no cable in the box and a length has to be on hand, on a light that was £22.99 with an E27 cap around 45 W. Standard 70 °C twin-and-earth is what many house circuits use, and the installer explainers say it does not meet zone 3, where insulation and sheaths have to withstand 170 °C. Silicone flex is the cable those guides point to on the warm side. SaunaShop sells 3 × 1.5 mm² silicone lighting flex described as suitable up to 180 °C, at £5.18 per metre including VAT, cut to length with a 1 m minimum. That is a cable a UK shopper can buy. It is not a wiring design. The change back to ordinary cable belongs in a junction box outside the room. The switch goes outside the cabin, and there is no socket in the sauna location. A class I metal housing has to be earthed. UK mains are 230 V.
EVTSCAN EVTSCAN sauna light

Testsieger

EVTSCAN EVTSCAN sauna light
7.9/10about £22.99
View offer

When the job is notifiable

In England and Wales, a room containing a sauna heater is a special location under Approved Document P. Notifiable work is a new circuit, a consumer unit replacement, or an alteration in that special location. Scotland and Northern Ireland are not covered by that map. A new cabin with a new lighting circuit is the electrician's certificate, not an afternoon with a screwdriver. Sauna circuits in the explainers are on a 30 mA RCD. The heater itself need not have RCD protection unless the manufacturer says so. If you are only changing a shade on an existing light and the circuit is untouched, that is the repair case the FAQ calls not notifiable, and you still stop if you cannot see how a metal body is earthed.

Stop if the cover has melted

A hole, a melted patch, or a trip is the point where you stop using the light and hand it over. A UK review of the Mumusuki shade describes a burned hole after a month. Take that shade out of use. Do not tape the hole. Do not fit a random LED into a shade whose title says E27 below 45 W. If a device has tripped, as one UK review of the Tbest lamp at £16.62 described when a blown bulb took out the supply fuse, you do not reset and try again until someone has looked at the wiring.

Common questions

Can you screw a sauna lamp to the wall and plug it in?
No. The ten lights in this comparison are fixed fittings, not lamps with a BS 1363 plug. The EVTSCAN review is the plain example: no cable in the box, so a length has to be on hand before anyone connects it.
Where must the light not go?
Not in zone 1. On the installer explainers of Section 703, that is the sauna heater and the space out to 0.5 m from it. Do not put the lamp over the stones or inside that half-metre.
What cable replaces twin-and-earth inside the hot part of the cabin?
On the warm side of zone 3, the explainers ask for insulation and sheaths that can withstand 170 °C. Ordinary 70 °C twin-and-earth does not meet that. The electrician chooses the route and the joint back to ordinary cable in a box outside the room.
When is the work notifiable in England and Wales?
When you add a new circuit, replace a consumer unit, or alter an existing circuit in a room that contains a sauna heater. Replacement, repair and maintenance are described as not notifiable. This map is not the one for Scotland or Northern Ireland.
What if the cabin arrived prefabricated?
A prefabricated cabin that complies with a relevant equipment standard can sit outside Section 703. That is a limit in the installer explainers, not a reason to connect the light yourself. The supply into your consumer unit is still electrical work in the house.
When do you stop using a shade and call an electrician?
When the cover has a hole or a melted patch, or when a device has tripped. Leave that light out of use. Do not tape the hole, and do not fit a random LED into an E27 shade capped around 45 W.

Related pages

Sauna lamp buying guide

Best sauna lamp

Sauna lamp

Sauna light IP rating for a UK cabin: IPX4 and heat

Sauna lamp vs steam room light: heat and corrosion

Sources

Public UK sources and the amazon.co.uk listing files named below, checked for this comparison on 19 October 2026. Page updated October 2026.

  1. Installer Online, electrical requirements for sauna cabins (retrieved 19 October 2026)
  2. Elec-Mate, sauna electrical installation (retrieved 19 October 2026)
  3. Approved Document P (2013 PDF) (retrieved 19 October 2026)
  4. legislation.gov.uk, SI 2012/3119 (retrieved 19 October 2026)
  5. IET, Part P frequently asked questions (retrieved 19 October 2026)
  6. SaunaShop, high-temperature cables for lights (retrieved 19 October 2026)
  7. Saunainter, EOS oval sauna lamp (retrieved 19 October 2026)
  8. amazon.co.uk listings for the ten ASINs, snapshot 19 October 2026 (retrieved 19 October 2026)