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Coloured LED "filament" lamps for external use ?

broadgage
I am about to put up my Christmas lights, which this year will include a mains voltage festoon of the traditional type. 40 B22 lamp holders moulders onto tough rubber cable.

I propose to use coloured LED "filament" lamps made by BELL LIGHTING.

These give an impressive light for only 4 watts, and in very striking saturated colours.


On receiving the lamps, I am rather concerned to observe that they are "for indoor use only"

Does anyone know why ? they certainly look waterproof, with a glass bulb directly sealed to the metal cap, and with only 4 watts wont get hot enough for cold rain to shatter the glass.

I am inclined to use them, but don't like ignoring the instructions.

The festoon will  be connected to the mains via an isolating transformer to prevent any electric shock to earth, and an RCD as a second line of defence.

LED lamps
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  • 0
    This 'didn't test it so err on the side of caution' reminds me of the old days of BABT approval for telecommunications equipment.


    Most fax machines sported a REN of 3... They actually didn't take much current at all from the line, but BABT's method of testing was to take a 4000 ohm bell (the canonical REN:1) and whack the devices in parallel on a simulated line, and wait till the bell stopped working (or they ran out of devices).


    The brackets there hold the answer. Most fax machines were state of the art, so the company would only send one sample for testing...and given that a normal phone line was assumed to have a REN of 4... the fax machine or modem or whatever had to be classed as REN 3


    Yes, i'm old

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  • 0
    This 'didn't test it so err on the side of caution' reminds me of the old days of BABT approval for telecommunications equipment.


    Most fax machines sported a REN of 3... They actually didn't take much current at all from the line, but BABT's method of testing was to take a 4000 ohm bell (the canonical REN:1) and whack the devices in parallel on a simulated line, and wait till the bell stopped working (or they ran out of devices).


    The brackets there hold the answer. Most fax machines were state of the art, so the company would only send one sample for testing...and given that a normal phone line was assumed to have a REN of 4... the fax machine or modem or whatever had to be classed as REN 3


    Yes, i'm old

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