--- title: "LED mirror colour temperature: which kelvin? | Nuevabaño" description: "Warm, neutral or cool white: how to choose the colour temperature of an LED bathroom mirror, what CRI means, with the Luz Round mirror as an example." url: https://www.nuevabano.com/en/blog/led-bathroom-mirror-colour-temperature/ language: en --- [LED mirrors](https://www.nuevabano.com/en/collections/led-bathroom-mirrors/) Published November 6, 2026 2 min read # LED bathroom mirror: how to choose the colour temperature (3000, 4500 or 6500 K) Warm, neutral or cool light? Luz Round offers all three. Here is what the kelvins mean, when to use each one, and why colour rendering matters. In this guide 1. [What the kelvin values mean](#what-the-kelvin-values-mean) 2. [Why colour rendering matters](#why-colour-rendering-matters) 3. [How the backlight works](#how-the-backlight-works) 4. [Made for the bathroom](#made-for-the-bathroom) 5. [Ø 60 or Ø 80 cm?](#ø-60-or-ø-80-cm) 6. [Frequently asked questions](#faq-title) The product in this article [**Luz Round** Round backlit LED bathroom mirror](https://www.nuevabano.com/en/collections/led-bathroom-mirrors/luz-round/) [See the product](https://www.nuevabano.com/en/collections/led-bathroom-mirrors/luz-round/) [Download the technical sheet](https://www.nuevabano.com/documents/nuevabano-ft-luz-round-en.pdf) The light of a bathroom mirror is not only a question of brightness. Its colour changes how you see your skin, your make-up and the whole room. [Luz Round](https://www.nuevabano.com/en/collections/led-bathroom-mirrors/luz-round/) offers three colour temperatures, so you can pick the light that suits the moment. ## What the kelvin values mean Colour temperature is measured in kelvin (K). The lower the value, the warmer and more yellow the light; the higher the value, the cooler and bluer it looks. - **3000 K, warm white:** a soft, relaxing light, close to a traditional bulb. Ideal in the evening and for a cosy atmosphere. - **4500 K, neutral white:** a balanced light, close to daylight indoors. The best everyday choice for grooming. - **6500 K, cool white:** a crisp, bright light. Useful for precise tasks such as shaving or applying make-up in detail. ## Why colour rendering matters Colour rendering index (CRI) measures how faithfully a light shows colours, on a scale up to 100. The LEDs of Luz Round have a CRI above 85: skin tones look natural, and you see the real colour of foundation or lipstick. ## How the backlight works Luz Round is lit from behind by SMD 2835 LEDs, 120 per metre. The light spreads around the frameless round glass and onto the wall, which gives a soft halo without glare. The One Touch sensor on the glass switches the light on and off. ## Made for the bathroom - **Built-in anti-fog:** the glass stays clear after a hot shower. - **IP44 rating:** protected against splashing water. - **Copper-free mirror, 5 mm:** no black spots or darkened edges appearing over time with humidity. As with any electrical product in a bathroom, the mirror is connected by a qualified electrician, who respects the safety zones defined by local regulations. ## Ø 60 or Ø 80 cm? Choose a mirror about as wide as the basin or slightly narrower than the vanity. Ø 60 cm suits a single basin such as [Felis](https://www.nuevabano.com/en/collections/countertop-basins/felis/); Ø 80 cm suits a wider vanity or a mirror meant to be the focal point of the wall. For a rectangular shape with the same lighting, see [Luz Square](https://www.nuevabano.com/en/collections/led-bathroom-mirrors/luz-square/), and read our [LED mirror buying guide](https://www.nuevabano.com/en/collections/led-bathroom-mirrors/). ## In video ## Frequently asked questions **Which colour temperature is best for make-up?** Neutral white (4500 K) is the most versatile for everyday make-up. Cool white (6500 K) helps for detailed work. The high colour rendering (CRI above 85) keeps skin tones natural. **What does CRI above 85 mean?** The colour rendering index measures how faithfully a light shows colours, up to 100. Above 85, skin tones and make-up colours look natural. **Does the mirror fog up after a shower?** No. Luz Round has a built-in anti-fog function that keeps the glass clear after a hot shower. ## More articles [ Luz Round / Luz SquareNovember 6, 2026 ### Round or rectangular LED mirror: Luz Round or Luz Square? Same lighting, same anti-fog, two shapes and four sizes. How to choose between Luz Round and Luz Square for your washbasin. Read more](https://www.nuevabano.com/en/blog/luz-round-vs-luz-square-led-mirror/)[ Luz SquareNovember 6, 2026 ### LED mirror above a vanity: size, height and installation of Luz Square 60 × 80 or 80 × 80 cm? At what height? Where should the power supply go? A practical guide to installing a rectangular LED mirror. Read more](https://www.nuevabano.com/en/blog/luz-square-led-mirror-size-height-installation/)[ Aire Walk-InNovember 6, 2026 ### Walk-in shower layouts: three ways to use the Aire Walk-In screen Compact, standard or long shower area: how to choose between 80, 100 and 120 cm, where to place the shower head and the drain, and how to plan the floor. Read more](https://www.nuevabano.com/en/blog/aire-walk-in-shower-layout-ideas/)