Neutral 2-3V above earth is normal. Finding the Culprit. Bad flashing is normally caused by dimmer switches or illuminated switches. If you’ve tried steps 1 and 2, the problem may not be with the offending light bulb at all. Wiggle the switch gently to see if it evokes a flicker; if yes, simply replace it to stop the strobe light effect. I've put a meter across, and with the light switched OFF, there's around 12v in the cable. I have noticed intermittently there is a flicker from the bulb when switched off, this can go on for 5-10 minuets after? One incandescent light on the same circuit will normally stop LEDs and CFLS from flashing by bleeding off any leakage current. The bulb we have looks like this . It's not the bulb, as I've swapped it with other LEDs, and I've … Another serious issue that could manifest as a flickering bulb is a switch failure. In the bathroom, the bulb flickers on and off when it's switched off. Just remember to turn off the light before removing or adjusting the bulb to prevent burning or shocking yourself. In that case, the next thing you should troubleshoot is the light switch. Is It the Light Switch? If the flicker is significant or has changed in unexpected ways, you should investigate. We have LED bulbs in our apartment. The circuit is wired as follows: Pendant is top of stairs & switched from 3 locations (2 way at top & bottom of stairs & an intermediate at one end of the landing). Normal loop in/out arrangement in the rose. Can I control the Light Switch (MIHO008) with a MiHome hand controller? Which bulbs should I use with my Light Switch (MIHO008)? The issue could also arise from a loose connection between the plug and the outlet. This is dangerous as well, but the danger is confined to just the switch, unlike the loose circuit connection which endangers the whole system. A bad connection in your fixture’s on-off switch may result in irregular flickering. 3. Why do my LED bulbs flicker when on, or flash when off? LED flicker used to be a common problem. If I toggle both switches so the light is off again, there's 30v-38v in the cable, and this is enough to trigger the light flickering. MEN does not normally stop LED/CFL flashing, and you'd still expect 2-3V at the light fitting. Is the offending flashing bulb in a lamp / circuit with a true mechanical switch, or is there an 'electronic' switch (like a lamp where you merely touch the base to turn it on or off)? Usually it's because of a common power connection that needs tightening. Tracking something similar I noticed that the flicker only happened when an air conditioner across the road, started. If it’s a normal single bulb fitting (screw-in or bayonet), there should be no flickering regardless of whether the bulb type is LED, CCFL or Incandescent. But if all lights flicker, why do some people think flickering LEDs are a problem? Our mains voltage is 220v. Pattern: One light flickering Probable Cause: You have a bad bulb or the bulb is loose in its socket. As pointed out in other answers, you haven’t specified the type of bulb. This was because – unlike incandescents, halogens and fluorescents – LEDs have no persistence. It’s an isolated problem, solved by switching out for a new bulb or simply screwing the bulb more tightly into its socket. Same when it was a CFL bulb before I switched to LED cause I hate CFLs. I've come across a single pendant fitting fitted with a energy efficiant bulb that flashes intermitantly when switched off. All mains-powered light sources flicker, all the time. I have a 1930's House but it had a modern circuit board, it happens in the bedrooms (sometimes) on a single switch and mainly on the landing light which is a double switch? Light Switch (MIHO008) Help Sheet; Can I use the Light Switch (MIHO008) in an upstairs/downstairs arrangement? 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