How do you change the light on the Sterilight Water Sterilizer?

Unplug The Transformer. Fallow the cable from the transformer to the light bulb connector. There is a silver clip that secures the assembly. Gently pull it up. The black connector and bulb can be pulled out from the housing a few inches Remove the connector from the bulb, pull bulb out carefully. Don't twist or angle the bulb. Be cautious of the quartz sleeve that stands as the only barrier between you and the water. Put in the new bulb and attache connector. Slide assembly back onto housing. Push down the silver clip. Power can be restored after the clip is fastened. Don't turn the light on when the bulb is visible, or if the housing is empty. It is damaging to eyes, and heats quickly without water. Don't remove the silver end caps. Don't worry about the extra o-rings. If the counter doesn't reset, hit the button. No, the water does not need to be off, bulb can be changed without interruption to process, although no microbiological control while light is off. Changing the bulb at regular intervals as recommended. Even if you can "see" the purple light, remember that if we see it its not ultra violet, and the lamp looses is intensity. Don't look at the lamp without proper eye protection.