Took apart this faulty GU10 LED spot light to see if the LEDs can be made to light. Using a constant current power supply set to limit at 250mA and gradually increased the voltage. These five 1W LEDs start to glow at about 12v and continued all the way up to 17v when the current limit kicked in.
These 1W LEDs can take a maximum current of 300mA when adequately heatsinked.
These 1W LEDs can take a maximum current of 300mA when adequately heatsinked.
Okay video, I'm a bit surprised this works out to be like 4 1/4 W in total, did you try running it at the real 300mA to see if they were still operating stably? Well I guess this is nonsense what I'm saying, these leds could probably do 350mA for a couple of thousand hours, in the end there's still a direct (log) causal relationship between current limit and mtbf
They were very bright – the manufacturer would want to run them as bright as they can. But so many I've tried are really too bright and so get hot and fail early. Admittedly I'm buying really cheap lamps – the expensive branded types are probably much more reliable.
Were they that bright when the unit was working or was the internal circuitry limiting the current/voltage aggressively.
it's a ZXY6005 – from eBay