Someone demonstrated these "nOOds" (which are completely different than the filaments being discussed here) at a maker event. They were blindingly bright, and drawing several hundred milliamps.....
The guy had neglected to read the recommendation at Adafruit:
"As the LEDs are in parallel, if you were to power them directly from 3V they can draw up to 200mA - however, like other LEDs it's not recommended to drive them in 'voltage' mode. We recommend current limiting with a resistor to let max 50mA...."
The nOOds are pretty cool, extremely flexible, with a bend radius of half an inch or less. They are available in an abundance of colors. Here's a screenshot from a video at Adafruit.
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