MR16 LED problem!

[gazzamikes]

This may be me just having a bad day but installed 12 MR16 24V downlights, customer requested led, ordered them from toolstation as it was literally two second walk. all connected and fitted etc, big switch on and all i got was a little flash from some and nothing from others! made a test set up and tried with and without transformer, contacted manf they reckon they should work and that they maybe dodgy batch... all 12? any ideas guys? probably such a simple answer but today brain doesnt want to function! thanks!!

 

[telectrix]

surely they.re 12volt and LED lamps require the correct trannies/drivers. you will probably need to replace all the trannies

 

[gazzamikes]

sorry yes 12v not 24v according to manf they dont need require led drivers, surely they would?

 

[telectrix]

but they do need a tranny suitable for LED. not sure what they are called, constant current or constant voltage or someting. some trannies require a minimum load or they shut down. haqve you measured the volts at the lamps when switched on?

 

[sjhall]

what make are they ? sounds like they need LED drivers

 

[gazzamikes]

reading at 12.14V thats the impression i was under, a constant driver of the required current

 

[telectrix]

i'd take a tranny and a led fitting to the wholesaler . fit a 13A plug and get them to plug it in.

 

[gazzamikes]

they are called L.E.D ultimate so not a well knwon make, my first though was poor make

 

[gazzamikes]

thats good idea ill nip it tomorrow, just a pain isnt it when near the end and things go wrong

 

[johnthesparky]

you get constant current and constant voltage, and I have fitted a current driver as specified to a firstlight fitting that just pulsed, ended up going back with a firstlight driver and it worked fine, even though the specs were the same for both drivers....

sounds to me like its a driver problem, is there a recommended driver for the fittings?

 

[gazzamikes]

they were unable to recommend one, they had one at £24.97 but didnt have any in stock, are we talking one per fitting as with trannys? because in this case it makes one expensive job!

 

[Dunc]

Did you wire it so there was a transformer per lamp or did you run multiple lamps of a single transformer? If it's the latter it generally won't work as the transformers don't like it. Quick fix is replace the transformer for a 12V LED driver. If it's the first scenario then the lamps and transformers may not be compatible. Again replace the transformers for drivers and all will be well.

 

[gazzamikes]

each fitting has a tranny. thanks for your help

 

[telectrix]

should have used GU10 fittings. :death:

 

[kevben]

Agree with telectrix!!! Why pay more for transformers/drivers for LED fittings?
They cost a fortune as it is & will not give more for your buck!!!

 

[electromonkey]

I had an almost identical problem the other week where a customer bought all his own materials. I went down the GU10 route and he's now happy as Larry.

 

[mogga]

just a couple of words HALERS EVOLED they will sort the problem right out 240v in nice led light out n7yr gaurentee
OK they cost around £40 a fitting but last at least 7yrs check their website n download calculator thingy they got there