You filled the tub, set the jets to low, poured a glass of wine, and then realised the only light source is the kitchen window and a security floodlight that makes the patio look like a crime scene. The mood you imagined — relaxing evening soak under soft, colourful light — requires actual planning. Hot tub lighting transforms the experience from functional to genuinely atmospheric, and getting it right involves more than buying the cheapest LED strip from Amazon.
In This Article
- Why Lighting Matters for Hot Tub Enjoyment
- Types of Hot Tub Lighting
- Built-In vs Aftermarket Lighting
- Colour Temperature and Mood
- Best Hot Tub Lighting Options in the UK
- Underwater Lighting
- Perimeter and Pathway Lighting
- Smart Lighting and App Control
- Electrical Safety Around Water
- Creating a Complete Lighting Scheme
- Frequently Asked Questions
Why Lighting Matters for Hot Tub Enjoyment
Safety First
A dark patio around a hot tub is a trip hazard. Wet surfaces, steps, and the edge of the tub itself need to be visible enough to navigate safely but not so bright that the relaxation is ruined. The sweet spot is gentle, diffused lighting that shows you where to step without turning the garden into a stadium.
Setting the Mood
Hot tubbing is supposed to be relaxing. Harsh white overhead light — the kind from a porch lamp or security light — creates the opposite of relaxation. Warm, low-level lighting in and around the tub triggers your brain to wind down. There is a reason spas spend thousands on their lighting design — it is fundamental to the experience, not an afterthought.
Year-Round Enjoyment
In summer, you might use the tub at 9pm when there is still some daylight. In December, you are getting in at 5pm in total darkness. Good lighting makes winter evening soaks feel inviting rather than gloomy, which directly affects how often you use the tub through the darker months. If you have invested in a gazebo or enclosure, lighting completes the setup.
Types of Hot Tub Lighting
Underwater LED Lights
LEDs mounted below the waterline inside the tub. These create the most dramatic visual effect — the light refracts through the water and illuminates the jets, creating a glowing, spa-like atmosphere. Most modern hot tubs come with at least basic underwater LEDs, but the quality and controllability vary enormously between brands.
Perimeter Lighting
Lights mounted around the outside base or rim of the hot tub, illuminating the surrounding deck or patio. These provide functional visibility (you can see where to step) and add a subtle glow that frames the tub without overpowering it.
Pathway and Step Lighting
Low-level lights along paths, steps, and the approach to the tub. Essential for safety, especially on raised decking or where there are level changes between the house and the hot tub area.
Ambient Garden Lighting
Broader lighting that sets the mood for the entire hot tub area — fairy lights in trees, lanterns on tables, uplights against walls or fences. Not hot-tub-specific, but part of the overall atmosphere.
Floating Lights
Waterproof LED orbs, cubes, or candles that float on the water surface. These are inexpensive, battery-powered, and create a beautiful effect without any installation. Good for occasional use and parties, though they get in the way of the jets if you leave them in during a soak.
Built-In vs Aftermarket Lighting
Factory-Installed Lighting
Most hot tubs costing £3,000+ come with built-in underwater LEDs as standard. Premium brands (Jacuzzi, Hot Spring, Artesian) include multi-zone colour-changing LEDs with remote control. Budget tubs may have a single LED light that cycles through colours automatically with no user control.
What to Check Before You Buy a Tub
If lighting matters to you, ask about it before purchasing. Key questions:
- How many LED zones are there? (More zones = more control over colour and effects)
- Can you set a static colour or does it only cycle automatically?
- Is there a remote control, app control, or only a button on the topside panel?
- Are the LEDs replaceable, or is the entire light unit sealed?
- What is the LED lifespan rating? (Good units last 50,000+ hours)
Aftermarket Options
If your tub’s built-in lighting is basic (or nonexistent), aftermarket solutions can transform it:
- Magnetic underwater lights — waterproof LED units with magnets that stick to the inside of the tub wall. No installation needed. About £15-30 each from Amazon UK.
- Floating LED lights — drop them on the water surface. From £10 for a pack of 4-6.
- Perimeter LED strips — IP67/IP68 rated LED strips that adhere around the tub exterior. About £20-40 for a 5m strip with remote control.
- Solar pathway lights — stake-mounted LEDs along the path to the tub. From £15 for a pack of 8-10.
Colour Temperature and Mood
Warm White (2700-3000K)
The default for relaxation. Warm white mimics candlelight and signals your brain to produce melatonin (the sleep hormone). This is the colour temperature you want for evening soaks when winding down before bed. It flatters skin tones, creates a cosy atmosphere, and does not disrupt your sleep cycle.
Cool White (4000-5000K)
Brighter and more clinical. Cool white is useful for functional lighting — seeing the temperature display, finding your drink, or cleaning the tub. It is not a relaxation colour. Avoid cool white for ambient hot tub lighting unless you specifically need visibility for maintenance.
Colour-Changing RGB
Most modern underwater LEDs offer colour cycling — red, blue, green, purple, and combinations. Used sparingly, colour can enhance the experience. A slow fade between warm colours (amber, soft red, purple) is pleasant. A rapid disco cycle through all colours is headache-inducing and best reserved for parties.
The Golden Rule
Pick one or two colours you enjoy and stick with them. Hot tub lighting should be consistent and predictable — you want to get in the tub and relax, not spend five minutes scrolling through 16 million RGB options on an app. Set it once, leave it.
Best Hot Tub Lighting Options in the UK
Best Underwater Aftermarket: Intex Multi-Colour LED Pool Light
About £25 from Amazon UK or Argos. A magnetic underwater LED that sticks to the wall of inflatable and acrylic hot tubs. Five colour modes (static and cycling), battery-powered (no wiring), and bright enough to illuminate a full-size tub. The magnet is strong — it stays in place against the water pressure from jets.
The build quality is basic (it is made by Intex, the inflatable tub brand), but for the price it is hard to beat. Expect to replace the batteries every 8-10 uses and replace the unit itself every 2-3 seasons as the waterproof seal degrades.
Best Floating Lights: LOFTEK LED Floating Pool Light (6-Pack)
About £30 for six from Amazon UK. Rechargeable LED orbs (no battery replacement needed) with 16 colours and four lighting modes via remote control. Each orb runs for about 8-10 hours on a full charge. The flat-bottomed design means they sit stable on the water surface without rolling.
These look stunning at dusk — six softly glowing orbs floating on the water creates an effect that built-in lighting cannot replicate. For parties and special occasions, they are the most impactful lighting option for the least money. Remove them before running the jets at full power, though — they get flung around.
Best Perimeter Strip: Govee RGBIC LED Strip Light (Outdoor, 10m)
About £35 from Amazon UK. IP67 waterproof rating, meaning it handles rain and splash (but not submersion). The RGBIC technology allows different colours along different sections of the strip simultaneously — you can have warm white along one side and soft amber along another. App control via Govee Home, plus Alexa and Google Home integration.
The adhesive backing sticks well to clean, dry surfaces. For best results on a hot tub exterior, use additional cable clips every 30cm — the adhesive alone can peel in humid conditions over time.
Best Solar Path Lights: Lights4fun Stainless Steel Solar Stake Lights (10-Pack)
About £25 from Lights4fun or Amazon UK. Warm white LEDs with stainless steel housings that look considerably better than the cheap plastic alternatives. Each stake charges via a solar panel on top and runs for 6-8 hours from a full charge. The warm white colour temperature (3000K) matches most ambient hot tub lighting.
Line them along the path from your door to the hot tub — they provide enough light to navigate safely without any wiring or running costs. Replace the rechargeable batteries every 12-18 months (standard AA NiMH cells, about £8 for a 10-pack).
Best Smart Bulb for Existing Fixtures: Philips Hue White & Colour Ambiance (Outdoor)
About £50 per bulb from Philips Hue, John Lewis, or Amazon UK. If you have an existing outdoor light fixture near your hot tub, swapping the bulb for a Hue outdoor-rated smart bulb gives you full colour and dimming control via the Hue app or voice assistants. Set a “hot tub” scene that triggers warm amber lighting at the perfect brightness every time.
Underwater Lighting
How Underwater LEDs Work
Hot tub underwater LEDs are sealed in watertight housings and mounted through the tub shell. They shine into the water, which refracts and diffuses the light throughout the tub. The effect is strongest with clear water — cloudy or foamy water diffuses the light and reduces the visual impact.
LED Lifespan
Quality underwater LEDs are rated for 30,000-50,000 hours. At 2 hours of use per day, that is 40-68 years — you will replace the tub before the LEDs fail. Cheaper units with poor waterproof seals fail much sooner because moisture ingress corrodes the electronics.
Replacing Built-In LEDs
If your factory-fitted underwater LED fails, replacement is straightforward on most tubs — the LED unit unscrews from the outside of the tub shell. Source a replacement from your tub manufacturer or a compatible aftermarket unit (common sizes are 2.5-inch and 3.5-inch fittings). Always drain the tub below the light fitting before replacing.
Colour and Water Chemistry
LED colour appearance changes slightly depending on your water chemistry. High sanitiser levels can create a slight green tint in the water that shifts how blue and white light appears. This is cosmetic — the chemistry is fine, the light just looks different.
Perimeter and Pathway Lighting
Why Perimeter Lighting Works
A ring of soft light around the base of the hot tub creates a “halo” effect that makes the tub the focal point of the garden at night. It also illuminates the step area and surrounding deck, which is where most slips happen. The best perimeter lighting is invisible during the day — hidden beneath the tub lip or behind the skirting — and only reveals itself at night.
Pathway Essentials
The route from your house to the hot tub needs lighting. At minimum, you need enough visibility to walk safely on wet surfaces in the dark. Solar stake lights along both sides of the path are the cheapest solution. Recessed deck lights (hardwired) are the most elegant but require professional installation.
Avoid Overhead Lighting
Do not install bright overhead lights near your hot tub. They create harsh shadows, eliminate the intimate atmosphere, and attract insects in summer. If you need overhead light for occasional maintenance, use a switched fixture that stays off during normal use.
Smart Lighting and App Control
When Smart Makes Sense
If you already use a smart home ecosystem (Alexa, Google Home, Apple HomeKit), integrating your hot tub lighting makes life easier. A voice command like “Alexa, set hot tub mood” can simultaneously dim the outdoor lights, set the LED strip to warm amber, and turn off the security floodlight. That is convenience that justifies the setup effort.
When Smart Is Overkill
If your hot tub is a simple, occasional-use setup, a basic remote control for the LED strip and a manual switch for the pathway lights is perfectly adequate. Smart lighting adds complexity (Wi-Fi connectivity, app updates, hub requirements) that some people find more annoying than helpful.
Best Smart Platform for Outdoor Lighting
Philips Hue has the widest range of outdoor-rated smart lights and the most reliable app. Govee is a strong budget alternative with good outdoor IP ratings. Avoid cheap unbranded smart strips from Amazon — they frequently lose Wi-Fi connection and stop responding to app commands.
Electrical Safety Around Water
The Non-Negotiable Rules
- All mains-voltage electrical installations near a hot tub must be carried out by a qualified Part P electrician
- Outdoor electrical circuits must be RCD-protected (residual current device) to prevent electrocution
- No mains-voltage fixtures within 1.5 metres of the hot tub water edge unless specifically rated for Zone 1 wet areas
- Extension leads must never be run to or near a hot tub — this is how people die
Safe Options for DIY
The following can be safely installed without an electrician:
- Battery-powered or rechargeable lights (floating, magnetic underwater)
- Solar-powered pathway lights (no mains connection)
- Low-voltage (12V/24V) LED strips with a transformer kept indoors or in a weatherproof enclosure at least 2m from the tub
- USB-powered lights connected to an indoor socket via a cable run through a window
When to Call an Electrician
If you want hardwired outdoor lighting, mains-powered spotlights, or any fixed electrical installation near water, hire a qualified electrician. The cost (£150-400 for a basic outdoor lighting circuit) is trivial compared to the safety risk. The IET Wiring Regulations (BS 7671) specify exact requirements for electrical installations near pools and hot tubs.
Creating a Complete Lighting Scheme
Layer Your Lighting
The best hot tub lighting uses three layers:
- Underwater — the centrepiece. Set to a warm colour (amber or soft white) at low-medium brightness. This is the hero lighting.
- Perimeter — functional and atmospheric. LED strip around the tub base in warm white. Provides safety lighting and a subtle glow.
- Ambient — sets the wider scene. Solar path lights, fairy lights in nearby trees, or a smart bulb in an existing fixture. Creates the approach atmosphere.
Avoid Over-Lighting
Less is more. A hot tub area with too many light sources feels like a theme park rather than a retreat. Three well-placed light elements at low brightness create a better atmosphere than ten bright sources competing for attention.
Test at Night Before Installing
Before committing to permanent fixtures, test your planned lighting by temporarily positioning lights where you want them and checking the effect at night. What looks good on a diagram does not always look good in reality. Spend an evening experimenting with position, colour, and brightness before drilling, wiring, or adhesive-mounting anything.
Frequently Asked Questions
What colour light is best for a hot tub? Warm white (2700-3000K) is the best default for relaxation — it mimics candlelight and creates a cosy, calming atmosphere. If your lights offer colour options, warm amber and soft purple are popular choices for evening soaks. Avoid bright white or rapidly cycling colours for regular use.
Can I add lights to my existing hot tub? Yes. Magnetic underwater LEDs stick to the inside wall of most tubs without installation. Waterproof LED strips adhere around the outside. Floating LED orbs sit on the water surface. None of these require wiring or professional installation.
Are LED strips waterproof enough for a hot tub? LED strips rated IP67 handle rain and splash — suitable for mounting around the outside of the tub. IP68 strips can handle brief submersion. For permanent outdoor installation near water, always choose IP67 or higher and ensure the power supply is kept dry and at least 2m from the water.
How much does hot tub lighting cost to run? LED lighting uses very little power. A full perimeter strip plus underwater LEDs typically draws 10-30W combined, costing less than 1p per hour to run. Solar path lights cost nothing to run. The energy cost of hot tub lighting is negligible compared to heating the water itself.
Do I need an electrician for hot tub lighting? For battery-powered, solar, or low-voltage (12V/24V) lighting, no. For any mains-voltage (240V) installation near water, yes — UK regulations require a qualified Part P electrician. Never run mains extension leads to or near a hot tub.