Noticed that my light E14 SES fittings only work with ses LED lamps with the black insulator between the tip and the thread.Any lamp with white insulator wont light.Are they different specs for these lamps?
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There is an international spec that you would expect manufacturers to comply with, but I've come across bulbs that seem to have variations in the angle of the cone at the base, and as per littlespark, where the base central contact doesn't protrude far enough to connect in the holder, which is presumably the trouble you are having.Are they different specs for these lamps?
Thank you ,will give it a try.There is an international spec that you would expect manufacturers to comply with, but I've come across bulbs that seem to have variations in the angle of the cone at the base, and as per littlespark, where the base central contact doesn't protrude far enough to connect in the holder, which is presumably the trouble you are having.
The problem isn't helped by the move to a safer arrangement of construction, where the screw thread of the holder is now insulating material, and the circuit is made by a spring contact at the bottom on the side of the holder that connects with the conical part of the SES thread. Your bulb holders may be of this construction.
For holders with weak springiness in either of those contacts, if bulbs get screwed in firmly, you can end up, when a bulb is replaced with a different brand, with one of the contacts not touching.
You might try, with the circuit isolated, using a tool to spring out (a little) whichever contact looks like it may not be touching the bulb.
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