Light source: LED bulb 5 watt included — Lumen: 320 — Kelvin: 2200 — 3000 — No transformer included — We recommend and have tested the following types: Niko 310-01900, Niko 310-0280, Jung 100-494-70S, Peha 00-260623, Tronix 215-131, Eltako EUD61NPN-UC