To the exponents of having no resistors in series with leds:
My son got a camping led lantern that has 24 white leds in it, some of them had stopped working and some of them were intermittent, some flashing. No problems some dry joints of course.
Opened up the box and almost died with a heart attack, 24 white leds, all in parallel, no resistor/current limiting anywhere, all driven by 4xAA batteries or 6V!! :shock:
Resoldering the joints brought back some leds and just killed others. The working leds were SO HOT that would give 6 degrees burns at the touch. Yes it was cheap, brand new in a box and sold at a stall that you will not find the next week. Working leds were almost bluish by the overdrive.
So money down the drain, the "manufacturer" got his money by bad design and the seller got his as a fly by night salesman.
Please DO NOT encourage bad practises here.