Tracking something similar I noticed that the flicker only happened when an air conditioner across the road, started. We have LED bulbs in our apartment. 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? It's not the bulb, as I've swapped it with other LEDs, and I've … A bad connection in your fixture’s on-off switch may result in irregular flickering. 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)? Which bulbs should I use with my Light Switch (MIHO008)? I've put a meter across, and with the light switched OFF, there's around 12v in the cable. Another serious issue that could manifest as a flickering bulb is a switch failure. But if all lights flicker, why do some people think flickering LEDs are a problem? In the bathroom, the bulb flickers on and off when it's switched off. Light Switch (MIHO008) Help Sheet; Can I use the Light Switch (MIHO008) in an upstairs/downstairs arrangement? LED flicker used to be a common problem. The bulb we have looks like this . Usually it's because of a common power connection that needs tightening. Pattern: One light flickering Probable Cause: You have a bad bulb or the bulb is loose in its socket. Is It the Light Switch? If the flicker is significant or has changed in unexpected ways, you should investigate. 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). Finding the Culprit. Why do my LED bulbs flicker when on, or flash when off? One incandescent light on the same circuit will normally stop LEDs and CFLS from flashing by bleeding off any leakage current. Just remember to turn off the light before removing or adjusting the bulb to prevent burning or shocking yourself. The issue could also arise from a loose connection between the plug and the outlet. 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. Can I control the Light Switch (MIHO008) with a MiHome hand controller? If I remember correctly, I should add a capacitor in series to the bulb … 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. Bad flashing is normally caused by dimmer switches or illuminated switches. This is dangerous as well, but the danger is confined to just the switch, unlike the loose circuit connection which endangers the whole system. If you’ve tried steps 1 and 2, the problem may not be with the offending light bulb at all. As pointed out in other answers, you haven’t specified the type of bulb. In that case, the next thing you should troubleshoot is the light switch. Wiggle the switch gently to see if it evokes a flicker; if yes, simply replace it to stop the strobe light effect. I've come across a single pendant fitting fitted with a energy efficiant bulb that flashes intermitantly when switched off. I have noticed intermittently there is a flicker from the bulb when switched off, this can go on for 5-10 minuets after? All mains-powered light sources flicker, all the time. 3. Neutral 2-3V above earth is normal. Normal loop in/out arrangement in the rose. Same when it was a CFL bulb before I switched to LED cause I hate CFLs. It’s an isolated problem, solved by switching out for a new bulb or simply screwing the bulb more tightly into its socket. 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