The Osram E40 HQL 400W is a with HID technology for application, especially for compact optical systems with high efficiency. This lamp has an excellent colour rendering of30-39, UV filter which prevents the discoloration of your items (please check Specifications whether UV filter is included) with the lamp. This is especially important because these lamps are mainly used in places such as restaurants, shop windows, sales floors and entrance areas, where they can easily be changed. gas discharge lamps equipped with reflectors with a very good lumen maintenance from the first to the last use. Osram E40 HQL 400W have a E40 base type, which allows them to fit perfectly in your old fixtures. With a long average lifetime of 24000 hours, Osram E40 HQL 400W bulbs are economical and do not require frequent replacement,