... power supply, switch on the moment of water, LED will shine;2. according to the water temperature ... water temperature in 33 °C ~ 41 °C , blue led will flash, **when water temperature in 42 °C ~ 45 ... °C ,Red led will flash **45 °C above water temperature in the ... promotional led gifts industry,we can do all kinds of led flashing products,welcome to inquiry lighted up shower ...