DiCUNO 100pc 5mm LED Light Emitting Diode Round Head LED Lamp Assorted Diodes Resistor Kit

This pack of diodes are good value for money. I have not analysed the ultraviolet doides and so cannot comment on their performance however the other diodes offer excelent performance (sometimes too good).The Red is a very narrow spectrum, could just be a monochromatic line, my test equipment is not good enough to resolve the difference.Orange is as bright as the red but the spectrum is quite broad extending from red into the yellow.Yellow is brighter than the red and the spectrum is a single line as near as my test equipment can resolve.Chartreuse(Yellow-Green) is quite dim, but this is a result of the chemistry of the diode and is the same for all Chartreuse LEDs, the spectrum is a broad band from green into yellow.Green is unusual. Normally Green LEDs are a single spectral line but again this depends on the chemistry of the diode. These Green LEDs give a broad spectrum which goes from blue to yellow but is far stronger in the green. They are VERY bright, brighter than any of the other LEDs in the pack, they are comfortable to look directly into at 100 microamps and below, at 1 milliamp they are painful to look into and at 12 milliamps the brightness is enough to leave an afterimage on your retina after just a short glimpse. They are very efficient but you will have to scale up the series resistors (and decrease the current) if you want to run them at the same brightness as other LEDs. The broad spectrum makes the colour more like greenish white than green. The main peak is NOT around 570 nm as claimed in the listing it is more like 530 nm but the peak is quite broad.Blue is a bit brighter than the red and again it is a single spectral line as near as my test equipment can resolve.Pink (or purple) is unusual, it is brighter than the red and the spectrum is in two parts there is a band in the blue and another band in the red with a large gap in between.The white and warm white both give ample brightness and a continuous spectrum without gaps (good for colour recognition). They are brighter than all the other LED colours in this pack except for the Green.

All is great. Only nice thing would be to add a small mark with color code on the leds. I dropped the box on the floor and trust me on this advice - avoid doing that :-D

These (5mm) LEDS are really nice quality and most of them are very bright (apart from chartreuse and UV), in fact the green led is so bright you will need to use a higher value resistor than for the other leds (a few hundred ohms for these but 1k or 2k ohm for the green one). I prefer these modern clear leds rather than the coloured plastic ones as you get a very clear light at a narrow frequency band (except white obviously which is spread over the spectrum) The pink led is a very nice inclusion, of course there is technically no such thing as pink light and the colour is achieved by mixing red/orange and blue light (hold a cd/dvd up to the led at an angle so you can see its colour spectrum) but looks really distinct and unusual (blue light from leds only became possible recently and in fact won the inventors a Nobel prize!)The plastic case is a good one, quite spacious too so room to add extra leds or resistors. But you will probably get the leds mixed up, since they are all clear they are not identifiable until lit. So it is useful to have a simple battery operated tester like the one shown in my photographs which uses just 3 components on a breadboard (An inductor coil, transistor and resistor - search for "joule thief circuit" for details) and enables me to insert several leds at a time powered by just one (old) 1.5V battery.

Good LEDs, in a useful case. There is a guide to the forward Voltage for each colour, can't claim I know it's accurate, but it might be. The legs are a little too short for some applications, but generally fine. No duds found so far.

Ten each ofTen different colours of LEDs. All in a handy plastic compartment case for easy storage and identification. The only thing missing sadly is that the information sheet does not show the wavelenghts of each LED (but these are shown in the Amazon listing)A super collection of LEDS, ideal for anyone interested in electronics.

Not bad. Nice selection. Havent soldered yet. Shame there is an odd number of each colour

Need one for the alarm on my trike. And did not know which colour to go for so just got this pack. Very good set. Thank you

Decent brightness and colours. Leds create a spotlight effect which may not be what you want (I didn't) but a small sanding to the surface creates a nice, less direct dissolved light.