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Old 13th Mar 2019, 9:43 pm   #61
broadgage
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Default Re: A Quick Question about Halogen to LED conversion

Quote:
Originally Posted by winston_1 View Post
There seems to be confusion here over terminology.
MR16 means multifaceted reflector 16 eights of an inch in diameter. It has nothing to do with the voltage or base of the lamp. Most 240v GU10 lamps are in fact MR16. Some LED lamps are the same size but don't have the multifaceted reflector. Manufacturers/sellers are to blame as they seem to refer to GU5.3 12v lamps as MR16 (which they are of course) but that is not the definition of MR16.

Electronic transformer. No such thing but again blame the sellers for misdescribing a switch mode power supply. A transformer is a device which changes voltage or current using electromagnetic induction. Isolating transformers work the same way but do not change the voltage.
Correct, strictly speaking.
However terminology evolves, and these days "MR16" is generally understood to mean a lamp with a 2 pin base and for 12 volts unless some other voltage is specifically stated, includes both LED and incandescent types.
Post #59 includes a picture of an LED replacement, clearly labelled as being "MR16"
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Old 13th Mar 2019, 11:09 pm   #62
winston_1
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Default Re: A Quick Question about Halogen to LED conversion

You are absolutely wrong. MR16 = multifaceted reflector 16/8" diameter. Nothing to do with voltage or base. That picture is labelled wrongly, it should say GU5.3

Ignorant manufacturers, or their marketing people, propagate these myths. No need for you to do so.
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Old 14th Mar 2019, 12:15 am   #63
AC/HL
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Default Re: A Quick Question about Halogen to LED conversion

Popular usage again. We may know the strictly correct names for these (and the other things, which I won't resurrect yet again, it's boring), but that won't change the popular usage. Suffice to say, we know what we're referring to.
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Old 14th Mar 2019, 12:15 am   #64
Lancs Lad
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Default Re: A Quick Question about Halogen to LED conversion

I'm only showing you what it says on the box.

Didn't mean to trigger a war of words!

I'm very peaceable, me!
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Last edited by Lancs Lad; 14th Mar 2019 at 12:21 am.
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Old 14th Mar 2019, 1:01 am   #65
Lancs Lad
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Default Re: A Quick Question about Halogen to LED conversion

Oh yes, Winston 1! That's a very good way of explaining it. Your substation analogy explains a lot!

I'd never thought of transformers like that before you said that.

Thanks so much
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