Optosupply 5mm superbright warm white current regulated LED

These are very nice, very bright warm white LEDs from Optosupply which have inbuilt constant current drivers, so you don't need resistors.

Rated output is 8,000mcd at a 30 degree beam angle at a typical current of 14ma or 18mA (there are two versions, you may get either, but they are pretty much identical). Colour temperature is a very nice 3400K.

Use them on their own, or in series with other LEDs to control the current in the whole string.

Part number is OSM5DK5A31A-CR18/CR14 and datasheet is here.