Pool Light Prices: What Decides the Cost, and How to Choose
The cost of lighting a pool is never the price of one light. It is the price of a complete 12 V circuit — lights, safety isolating transformer, junction boxes and cable — plus the electrician's work. This guide explains what moves that total, so you can compare offers on the same basis. Waterstar LED pool lights run at 12 V, have full brass connectors and come in warm white or cool white. The current price of each light, bulb, transformer and junction box is shown on its product page; this guide quotes no figures.
What decides the price of a pool light
- Light type. A nicheless light mounts flat on the wall. A niche light needs a niche built into the wall, but later only its LED bulb is replaced.
- Wattage. 18, 24 or 36 W. A higher wattage covers more water per light, so a large pool may need fewer lights.
- Pool construction. Concrete and liner pools take different niche-light versions.
- Number of lights. Set by the water surface area and the finish: deep pools and dark finishes need more light.
- Transformers. One T-1-300 transformer carries up to 200 W of lights; more lights or higher wattages mean more transformers.
- Junction boxes. Each light connects through a JB-1 junction box above water level.
- Cable. The further away the plant room, the longer the run and the larger the cable section needed to limit voltage drop.
- Installation. A new build and a renovation involve different work; the electrical work should always be done by a qualified electrician.
- Cost over the years. A replaceable bulb and available spare parts keep a light in service: every component of every Waterstar product is sold as a spare part.
Nicheless light or light with niche?
- Nicheless underwater light (LL-18, LL-24, LL-36): mounts on the pool wall without a cast-in niche, so it suits both new pools and renovations. Available in 18, 24 and 36 W.
- Underwater light with niche (UWL-1 for concrete pools, UWL-1-L for liner pools): sits in a niche built into the wall. The LED bulb (LB-18, LB-24, LB-36) can be replaced.
Safety first: only 12 V in the water
IEC 60364-7-702, the international wiring rule for swimming pools, allows only safety extra-low voltage (SELV) of no more than 12 V AC inside the pool, with the source installed outside the pool zones. Waterstar lights are fed through the safety isolating transformer (T-1-300: 220 V in, 12–14 V out, 200 W).
- Keep the total wattage on one transformer at or below 200 W: for example up to 5 × 36 W, 8 × 24 W or 11 × 18 W lights.
- Connect each light through a junction box (JB-1) placed above water level.
- Keep the 12 V cable runs short and size the cable for voltage drop; long, thin cables dim the lights.
- Have the electrical work done by a qualified electrician to the local wiring regulations.
How many lights does a pool need?
As a planning rule, allow one 24–36 W light for every 20–25 m² of water surface; deep pools and dark finishes need the upper end. Place the lights on the wall opposite the main seating area so they shine away from the people looking at the pool, and avoid aiming them at the main windows of the house.
Example: an 8 × 4 m pool has 32 m² of water surface and needs two lights. Our Underwater Lighting Set (2 × LL-24, one T-1-300 transformer and 2 × JB-1 junction boxes) covers it.
How to get a like-for-like quotation
Send us the pool dimensions, the finish, whether it is a concrete or a liner pool and the distance to the plant room. We return the number of lights, transformers and junction boxes, so every offer you compare covers the same complete circuit. For projects and larger orders, request a quotation.