All Electrum 9W B-22 Cool White Round LED Bulb (Pack of 9) are manufactured by using quality assured material and advanced techniques, which make them up to the standard in this highly challenging field. The materials utilized to manufacture Electrum 9W B-22 Cool White Round LED Bulb (Pack of 9), are sourced from the most reliable and official vendors, chosen after performing detailed market surveys. Electrum products are widely acknowledged in the market for their high quality.