Maybole Posted November 7, 2019 Share Posted November 7, 2019 My house has about 20 LED bulbs of 7,8 or 9 watts. Several have appeared to fail in the 15 months since new. However, I have discovered that the problem is a poor connection. If I tighten the "failed" bulb by a small amount perhaps only 10 degrees it comes back on. I have never had this problem with UK type bayonet fittings. Can the 50 Hz AC cause enough vibration to unscrew the bulb enough to disconnect it ? Link to comment Share on other sites More sharing options...
BritManToo Posted November 7, 2019 Share Posted November 7, 2019 (edited) Nah, it's corrosion in the humid atmosphere. Tightening it scrapes the rust off. Edited November 7, 2019 by BritManToo 2 Link to comment Share on other sites More sharing options...
NanLaew Posted November 7, 2019 Share Posted November 7, 2019 LEDs get hot, not quite as much regular incandescent bulbs but the metal screw-in expands and contracts as the fittings heat and cool down with with lighting cycles. Eventually they become slightly loose and as the OP discovered, a slight turn fixes any problems. This happens with screw-in filament bulbs too. The UK bayonet fitting does give a more solid contact on the barrel side. Link to comment Share on other sites More sharing options...
bankruatsteve Posted November 7, 2019 Share Posted November 7, 2019 Frequency can have affect on AC resistive loads but not that you would notice. Link to comment Share on other sites More sharing options...
.png.3b3332cc2256ad0edbc2fe9404feeef0.png)
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now