26 light-bulbs are stuck together like a cluster of bubbles. One light-bulb is connected to the power-source and burns. This bulb will light up the other bulbs, which function as a lampshade, diffusing and spreading the light. When the bulb is burned out: simply screw the lamp-holder on to an other bulb. “SPARE” is constructed from 25 classic clear light-bulbs and 1 clear LED-bulb that looks just like a classic bulb. Let a classic bulb or a LED-bulb burn. After +/- 50 years all the bulbs are burned up. Part of the permanent design-collection of: “DESIGN MUSEUM GENT” in Belgium material : 230 volt 25 dimmable clear glass light-bulbs. +1 dimmable glass LED bulb 4 watt. 210 lumen 2200K 230 Volt. 230 volt + E27 lamp-holder +2 meter cable + Europe-plug