20190711_182714 An open air cafe by the Rąžė bridge
20190709_072113 Don't Leave It Sideways
20190710_144257 R on a stump in the Samogitian Alka
20190710_144031 Deities of Moon, Sun and underground
P1020761 A dark-detecting solar-powered device?
I guess the point of this gadget demonstrated at Maker Faire 2008 is that it lights up when it detects dark.
The description of the Simple Solar Circuits group of exhibits from Evil Mad Scientist Laboratories says: "We demonstrate a few simple circuits -- that you can build yourself -- to make small solar and battery-powered night lights, garden lights, and decorations for Halloween."