Existing 12V : 50w Halo conversion to 12V : 7.5 LED lamps...

[Engineer54]

Not having done much in the way of conversions of this type, i'd be obliged if any you out there can confirm or otherwise, that standard 12V 60VA TX's are not suitable to drive low wattage LED lamps.

I've been asked by a new friend here, if his shop light fittings that consist of 4 X 50W halo lamps can have direct replacement of 7.5W LED lamps. I'm pretty sure that these low wattage LEDs don't like the standard wound TXs and require electronic units. ...So what say you?? lol!!

He has around 20 of these recessed fittings to convert. So it could be a substantial savings for him, as his current lighting load of these fittings are running at around 4 KWh!!

Apart from my initial query, if these LED lamps do require one of these electronic units, are they available to drive 4 X LED lamps? What sort of price would these voltage/current based units cost in the UK, just as a comparison, as i'm pretty sure they are going to be much much cheaper here.

 

[benji]

iv,e got 6 x 35w halogen in the kitchen ,changed 1 last night to a 240v 4w led getting about 270 lux at worktop directly below fitting a little bit less than halogen but not to bad,might look for some 6w though

 

[polo1]

Not having done much in the way of conversions of this type, i'd be obliged if any you out there can confirm or otherwise, that standard 12V 60VA TX's are not suitable to drive low wattage LED lamps.

I've been asked by a new friend here, if his shop light fittings that consist of 4 X 50W halo lamps can have direct replacement of 7.5W LED lamps. I'm pretty sure that these low wattage LEDs don't like the standard wound TXs and require electronic units. ...So what say you?? lol!!

He has around 20 of these recessed fittings to convert. So it could be a substantial savings for him, as his current lighting load of these fittings are running at around 4 KWh!!

Apart from my initial query, if these LED lamps do require one of these electronic units, are they available to drive 4 X LED lamps? What sort of price would these voltage/current based units cost in the UK, just as a comparison, as i'm pretty sure they are going to be much much cheaper here.

You can get 230V GU10 LED replacement lamps and change the lampholders and diss the TXs; as you suggest, you cannot use standard TX's with replacement led lamps into your existing fititngs. You will require either constant current or constant voltage drivers, depending upon the spec of the replacement lamps you purchase.
Regards.

 

[Richard Burns]

12V wound transformers should be OK, I think, depends on the stability of the output. It is the bog standard electronic transformers that will not run the low current required for LED as they do not reach the minimum wattage, though possibly if you ran say five from one transformer they may work, haven't tried it, of thought of it till now.

The LED drivers tend to start at around £10 here and as polo says constant current or voltage depending on application. There are not many multiple drivers around but they come up about £35.

 

[needasparks]

Hi fella, I have a job on the go at the moment with the Halo lamps (111). Problem i have though is have tried two types so far and due to the cooling fins on the back of lamps they will not fit in unless a slight mod is done with a hammer (lol) but still looking. I have a shop with about 40 4lamp fittings also so would be a massive saving and reduce to heat in the shop. please let me know how you get on.

 

[Engineer54]

Hi fella, I have a job on the go at the moment with the Halo lamps (111). Problem i have though is have tried two types so far and due to the cooling fins on the back of lamps they will not fit in unless a slight mod is done with a hammer (lol) but still looking. I have a shop with about 40 4lamp fittings also so would be a massive saving and reduce to heat in the shop. please let me know how you get on.

Will Do!! lol!!

He is bringing one of these 4 lamp fittings and 4 LED lamps round to me tomorrow, so i'll see what's what then. I'm not sure what the TX's are on these fittings yet, only that there is one for each halo. If they are wound TX's then i'll try one first, if OK, i'll individually connect to each lamp. If not, i'll try connecting all 4 LEDs to one of them and see what we get...lol!!!


From what i understand from my friend so far, the replacement lamps are a complete unit that will replace the swiveling module as a whole, it's not just the lamp itself.... Anyway all should become clear tomorrow ...lol!!!

 

[needasparks]

TBH that was what i was expecting to find on the last one i tried but it used the same fandangled three clip jobs, really interested to see how you get on. The first i had was a megaman one, can't remember the second as was losing the will to live at that time. I do know you get choices of colour though which was a bonus but short lived.

 

[alarm man]

i replaced some gu10s with osram 4.5w warm whites as the bairn likes the landing lights on all night,quality light output on par with 50 watters

 

[needasparks]

Wish they were that easy Alarm man.

For those not familar with these : Osram Halospot 111 Lamps

 

[alarm man]

Wish they were that easy Alarm man.

For those not familar with these : Osram Halospot 111 Lamps

mine were easier..i'll admit..

 

[Engineer54]

needasparks,

Well he brought the stuff round, and as it happens it was the same type of lamps as those you posted ''Osram Halospot 111 Lamps''!! The difference being the original lamps were plug-in halo's. The replacement were a direct swap for the halo-spot, so i had to rewire from the transformers, which as luck would have it, were of the standard wound type TX's. That's where all the good news stops.

After having rewired the fitting to take these new LEDs, put a plug on the end of the lead and switched on. If these were 7.5 W LEDs they were of a real bad quality, because the light they gave, was at the very best equivalent to a 35W halo. I was expecting much better from a 7.5W LED, after having seen 5W LE D's match the 50W halo's with little trouble!! I don't know if the LEDs work better with the correct drivers, or not, but i wasn't impressed.

So now he's off to see if he can find some branded good quality LEDs of the same type, so many to choose from over here, rather him than me!! ...lol!!

 

[mogga]

Engineer when you say "HALO" most guys are taking it as HALOgen ???? would I be correct in my thinking you mean "HALO" lamps similar to AR111 lamp or the smaller ones with SBC fitting??

If its AR111HALO lamps there are after market LEDs but they would need individual current drivers

 

[Engineer54]

I'm talking about these things Osram Halospot 111 Lamps but they ain't Osram, just the same physical look to them. But, as i said before, i've never really got into the what's and wherefores of the low voltage LEDs. Are you saying that the wound TX's aren't any good for supplying LEDs?? If so, can you give a reason? I'm aware that the modern electronic TX's need a minimum loading for them to work, but i can't see why a standard wound TX would have a problem... Perhaps i'm missing or overlooking something that should be obvious?? lol!!


EDIT: ...The original halogen lamps were M16 bi-pin plug in things, but the replacement LEDs, came as a complete module lamp similar to the osram lamps above with the G53 spade type connections.... So a bit of hashing around to fit these LEDs. but everything lined up correctly, the swivel fixings everything. If the LED'S were bright enough the conversion job would have been a total success!!

 

[needasparks]

Sorry Eng54, did not quite get that. You tried them on the wire wound job or used a new dc driver ?

 

[mogga]

Nappies required here iv just checked the prices FFS £40+ per lamp no wonder the resteraunt chain I do are still "Thinking" about it pmsl