These are similar to the Toyny Foya Flame, but use fewer, brighter leds. They simulate a softly flickering flame and were probably originally created for use in small lightbulbs. They're available in two a sizes and put out a TON of light for they weight they ultimately cost.
The Long version is 50mm in length and weighs 0.9804g, while the short version is only 35mm long and weighs in at 0.6403g.