0.36 watt light greenish blue 3V LED filament

These are becoming popular in replacement lamps for incandescent globes, but now you can get them separately for experimentation. They use a ceramic substrate with multiple LED chips connected in parallel, all covered in a phosphor. Note that because they are ceramic based, they are not flexible!

These are rated at 3 volts at 120mA total, 0.36W continuous.

The colour on these is a very light greenish blueish white, think cool white and aqua mixed together (they were meant to be green, but the phosphor generated colours can vary somewhat).

Total length is 38mm, with a 29mm long light emitting area. Around 1.6mm diameter.

Use them to make your own custom lamps, or even novel digital displays (like a big numitron, just LED!)

The anode is the lead with the small hole in it.