YUNLIGHTS LED Power Supply Driver Transformer 0-36W, 12V DC, 3A - Constant Voltage for LEDs, Including LED Strip Lights, Cabinet lights, LED Display and G4, MR11, MR16 LED Light Bulbs

Well packaged, did its job

This is a great product. Be careful not to over-tighten the electrical connection grub screws. I bought two; one is powering 3x 2.5 W LED discs (https://www.amazon.co.uk/gp/product/B00M4BBSLI/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1) and the other is powering 5x 2.5 W LED discs. I also tested that 1x 2.5 W and 2x 2.5 W also work fine from one transformer. I have not tested more than 5x 2.5 W (12.5 W). But I think it's correct to consider this product to be able to power from 0 W to its published max of 36 W (i.e. 0 - 3 A at 12 V). Some of the old AC Halogen transformers were not happy below a certain minimum - not true here. Before I bought this, I saw some worrying Q&As talking about wiring in series--which is wrong. Some people are getting confused between Watts and Volts. This device is 240 V AC input and provides 12 V DC constant output up to a maximum load of 3 A (or 36 W). If the LED bulbs need 12 V then all output connections must be in parallel to ensure each LED gets 12 V. Wiring in series would give 12 V ÷ number-of-bulbs to each bulb. The more you connect in parallel the more Amps are drawn and thus the more power is provided up to 36 W; don't exceed this. If you need more than 36 W, just buy more of these transformers and connect the transformers to the main 240 V AC in parallel. Consult a qualified electrician of course if you're unsure of anything or still think wiring in series is a good idea. Flicker free and buzz free. There is a minor on and off delay depending on load but nothing to worry about (< 1 second) and this is the transformer not the LEDs I'm using.

was so easy to install and works very well

Dangerous- Avoid! Wired up as per instructions and the unit blew up as soon as the mains supply was switched on (my mains also tripped out). Checking inside, it looks as though the label was placed the incorrect way around resulting in the mains supply being connected to the 12V output end and vice versa. This was confirmed by the HV circuitry (rectifier, fuse, etc) being at the labelled '12V' end. Looking at the PCB design, nothing physical differentiates either end (the screw terminal choice and location are identical at either end) . In this case, I suspect the external labelling to have been incorrectly oriented during manufacture. See photos, attached. Item will be returned for refund.

Used on demister for bathroom window.

It worked, looks to be good quality but can't give a better review as I'm not an electrician

Used one of these to replace 2 supplied 'power supply's ' fitted to 4 outside LED pedestal lights, Great replacement just check your power requirement..

Works fine. Watch out for the inrush current when it's switched on - it was enough to weld the contacts on the small relay (rated 5A) in my z-wave lighting control modules! So definitely not a soft start... If you have several of these on a circuit, I'd say there's a fair chance that they'd even trip a standard 6Amp B-curve MCB on a lighting circuit.