Mercury bulbs are high-intensity light bulbs that provide a huge quantity of light, which is typically required for street lighting and security lights. An orange-white light, which is frequently seen in street lights, is produced by the interaction of metals and gases inside the glass tube. Due of the wide color-temperature spectrum produced and the consequently low operating cost, these lights are preferred by indoor gardeners for general cultivation. Specifications: Colour Temperature: Warm White Base Type: E27 Watts: 250W Voltage: AC 220 - 240V Material: Glass