Reading an LED Shower's Colours

Where the power comes from

The first question anyone asks about an LED shower head is what happens when the battery dies. On these heads, nothing, because there is no battery. A small generator sits in the water path and is turned by the flow itself — the product description puts it plainly: operated by a generator, no need of battery.

The practical consequence is that the head lights when the water runs and goes dark when it stops, with no switch, no charging and no service interval. The LED faucet light works on the same principle with a different trigger: an internal pressure switch activates the light whenever the water is turned on.

The colour bands on the handheld

The documented handheld LED shower in this range uses four bands. Green shows when the water temperature is below 32°C. Blue shows from 33 to 41°C. Red shows from 42 to 45°C. At 46°C and above, the red flashes.

That last band is the one that matters. A flashing red is not a styling choice, it is the head reporting a temperature that will scald. It is visible from outside the cubicle, which is the whole point — a parent or carer can check the water without putting a hand into it.

The rainfall head reads differently

The LED rainfall head in this range starts its green band below 28°C rather than 32°C. If you are buying both and expect them to agree, they will not.

This is worth checking before an order rather than after. Each product page on this site states the bands for that specific head, and where a market expects particular thresholds, that needs to be confirmed in writing before production.

What these products are not

A colour-changing head indicates temperature. It does not control it. Nothing in this range limits the temperature of the water reaching the user — that is the job of a thermostatic mixing valve, and where scalding is a regulated risk, the valve is what the regulation is about.

Used properly, the two work together: the valve sets the ceiling, and the colour tells the person at the shower what they are actually getting today. Used as a substitute for temperature control, a colour-changing head is a false reassurance.

Where they sell

In retail, this is one of the few water products that explains itself on a shelf. One handheld in the range is supplied with the colour scale printed on the packaging, so a shopper understands it without a demonstration.

In care settings, schools and family bathrooms, the argument is different and simpler: the person least able to judge water temperature by hand is exactly the person the colour is for.