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  • I've got some old explosion-proof lights that use T30 E27 lamps. The ones they came with were too low output and I finally got round to replacing the original incandescents with LED replacements this weekend.

    Each light has 4 lamps, if all of them are LED they come on for a fraction of a second then go off, if I then return 1 incandescent (so 1 incandescent and 3 LEDs per light) they work without issue. Is there some way that their significantly lower power draw could be causing this due to some circuitry/safety feature in them?

  • Yes, I know that some dimmers have a lower wattage limit as well as the more obvious upper limit. Not sure what/why though...

  • What sort of switches are they?

    You may need to wire a resistor in series with the lamp to increase the holding current

  • My first thought is you are using a dimmer but you don't mention that specifically. If so you need to change to a specialised led dimmer to handle the lower voltage, v-pro are one of the most popular ones. You can change just the dimmer module and keep your switch plate / knob if you like.

    Alternatively you can fit a ballast in the circuit, they are available from most electrical wholesalers.

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