[-the-start-]Christmas Advent Candle Holder Lamp. LED E10 3V 0.06W The lamps emit a warm and beautiful glow from a frosted casing. Voltage: 3 Volts AC/DC Power: 0.06 Watts If you build your own candle holder and use these lamps with a battery, the thread is - and the solder pin is + on the lamp. NOTE!!! These lamps are NOT suitable for ordinary 7-arm candle holders that you connect directly to 240 volts. This lamp is suitable for candle holders powered by a transformer that provides 3-3.2 volts where the lamps are connected in parallel (= the other lamps light up when you unscrew one lamp). If your lamps are connected in series (= all lamps go out when you unscrew one), the lamps are suitable for: 7-arm candle holders powered by a transformer that provides 21-22.5 volts. 5-arm candle holders powered by a transformer that provides 16 volts. The lamps are suitable for, among others, PIXIE candle holders. [-the-end-]