Youmile 250-Pack (5 colors x 50-Pack) 3mm LED Light Emitting Diode Lamp Diffused Assorted Kit (White Red Green Blue Yellow)

Gut sortiert und gutes Preis Leistung Verhältnis

conforme à ma demande merci

These LEDs seem fine, especially for the price. The leads are 10mm shorter than the traditional standard, seems to be the new standard for cheap LEDs, so if you need traditional-length leads, look elsewhere. The leads are different lengths and the longer of them is the anode, as usual. The LED body is close to 3mm diameter, overall height approx 5mm, flange is about 4mm diameter.The red and yellow LEDs have a forward voltage of significantly less than 2v (approx 1.8v, from memory). They seem pretty efficient for traditional single-colour LEDs, having decent brightness at low currents.The green ones, which I expected also to be the traditional single colour type, are clearly the modern UV+phosphor type, having a higher forward voltage of around 2.4v. They're insanely bright and properly green, rather than the traditional yellowy-green.The white ones, and the blue ones, are also (as expected) phosphor types, with forward voltages around 2.5v. The white ones are not over-bright, by which I mean they work nicely as indicators, they're not the souped-up kind that are good for torches.All of them seem efficient and effective, but beware of the higher Vf for the green ones if you were expecting traditional green LEDs, and be mindful of the short leads.Aside from that, nothing much to say - good bunch of LEDs for a reasonable price that work fine and seem bright and efficient. I'd certainly happily buy more of these.

Precio bien. Calidad regular. Una parte importante de diodos venian mal o se fundian al conectarlos.

Prodotto valido, led luminoso ma non eccessivamente, opaco, cosa spesso apprezzabile poiché la eccessiva luminosità e brillantezza può essere fastidiosa. Diciamo che si avvicinano un pò alla luminosità dei 'vecchi' led anche se con luminosità maggiore.Spedizione veloce da parte di Amazon