What does this symbol mean?

[MrsRenovator]

Hello

What does this symbol mean on this swan neck light fitting please? The symbol that looks like an F after the 0.5? Can't find it with Google. I'm hoping its an obscure symbol for double insulated.

I have 5 x 20w swan neck halogens on a 30-105va transformer. I'd like more lumens this time round, and I'd rather go straight to GU10s since it looks like I would have to have 2 LED drivers to cope with the 5 x 6.6w mr16s I would like anyway.

But even if I get GU10 lamp holders with long tails, I'm guessing the arm of the lamp would still need to be double insulated wouldn't it?

I have looked at new gu10 fittings similar to my present ones but am astonished to find they are about £40 each! At that price i will happily keep paying the electric for my halogens.

 

[rsgaz]

Minimum distance from illuminated surface 0.3m – distance depends on wattage and reflector. Usually only used for products with reflectors built in or MR16, GU10. Ensure light source is not too close to surfaces causing them to overheat

https://www.pagazzi.com/faqs/

In other words, keep it away from walls/cupboards/etc that could get slight scorch marks, or anything that could burn(curtains, etc).

 

[winston1]

Minimum distance from illuminated surface 0.3m – distance depends on wattage and reflector. Usually only used for products with reflectors built in or MR16, GU10. Ensure light source is not too close to surfaces causing them to overheat

https://www.pagazzi.com/faqs/

In other words, keep it away from walls/cupboards/etc that could get slight scorch marks, or anything that could burn(curtains, etc).

OK looks like my guess was wrong.

 

[MrsRenovator]

Ok. Let's call them gu5.3 mr16's.

According to the Varilight website...

https://www.varilight.co.uk/configurator/product.php?code=yt50lz

...maximum 25w of mr16 LEDs

So
(6.5w X 5) + 10% = 35.75

 

[winston1]

...maximum 25w of mr16 LEDs

So
(6.5w X 5) + 10% = 35.75

In my mind 35.75 is greater than 25. So as I said use a 50 toroidal transformer.

 

[MrsRenovator]

I'm updating this in case anyone has the same dilemma in the future.

I have spoken to the very helpful people at
https://www.downlights.co.uk
and since the bulbs I want to use are the high CRI Philips expertcolor and they are a retrofit AC, rather than adding up the led wattage to work out which transformer you need, you add up the halogen equivalent. My 6.5w LEDs will be 35w equivalent. Times 5. Add 10%. 192.5
So I need the Varilight YT210Z - 210W. Easy!
At least, I hope I've got that right!

 

[winston1]

and since the bulbs I want to use are the high CRI Philips expertcolor and they are a retrofit AC, rather than adding up the led wattage to work out which transformer you need, you add up the halogen equivalent. My 6.5w LEDs will be 35w equivalent. Times 5. Add 10%. 192.5
So I need the Varilight YT210Z - 210W. Easy!

I really find that difficult to believe. Did you ask them why?

Also that YT210Z-210W is NOT a transformer. It is a switch mode supply.

 

[JohnW2]

.. since the bulbs I want to use are the high CRI Philips expertcolor and they are a retrofit AC, rather than adding up the led wattage to work out which transformer you need, you add up the halogen equivalent. My 6.5w LEDs will be 35w equivalent. Times 5. Add 10%. 192.5
So I need the Varilight YT210Z - 210W. Easy! .... At least, I hope I've got that right!

As has been said (not quite so strongly) that is really nonsense. The 'halogen equivalent' is irrelevant - all that matters in how much current the LEDs require.

If you did use a YT102Z, it ought to work, since that one has no minimum load. Many ~210W ones probably do have a minimum, which could well be so high that it wouldn't work with your LEDs.

Kind Regards, John

 

[MrsRenovator]

Thank you.
So much conflicting information. It's hard for a DIYer like me.

So i phoned Varilight customer services. He confirms what you said. His exact words were, "That would be crazy."
With good quality LEDs, there is no need for the 10% leeway apparently. And just use the actual wattage on the lamps. So since Philips are a good reliable brand of LEDs, 5 x 35w= 32.5w. So the YT70LZ is the transformer (Varilight's description) I need.

All I need now is to learn what kind of connector block will join all 5 lamps to the transformer....

 

[MrsRenovator]

But we have to accept that what is a correct term may no longer be understood. Language changes.

eg the etymology of the word Pedant shows it used to mean a teacher. Now it is a derogatory word for someone who is overly concerned with correctness. With that information to hand, if you were to be called a pedant, surely you wouldn't take that as a compliment?

 

[DetlefSchmitz]

With that information to hand, if you were to be called a pedant, surely you wouldn't take that as a compliment?

 

[John D v2.0]

But we have to accept that what is a correct term may no longer be understood. Language changes.

eg the etymology of the word Pedant shows it used to mean a teacher. Now it is a derogatory word for someone who is overly concerned with correctness. With that information to hand, if you were to be called a pedant, surely you wouldn't take that as a compliment?

You're going to fit in well round here, welcome to the forum