G10q 22 - 40W fluorescent ring Lumilux T9 C - OSRAM brand Thanks to its ring shape, this bulb is particularly suitable for round or square lights and provides harmonious, directionally neutral light. Their high light output and very good uniform illumination without shadows make them particularly interesting for use in commercial, catering and public buildings. Features: - Good average service life - Good colour rendering level (R80...89) - Bulb diameter 29 mm - Suitable for operation with electronic and conventional ballasts - Dimmable