This Replacement for Philips 411058 CDM330/U/O/4K/ED28 is a 330W ceramic metal halide HID lamp designed for high-quality, high-output lighting in commercial and industrial applications. Featuring an E39 mogul base and ED28 bulb design, it installs easily into compatible fixtures. Delivering approximately 33,000 lumens of 4000K bright white light with a high 90 CRI, this lamp provides excellent color accuracy and clear, natural illumination ideal for retail spaces, showrooms, stadiums, and architectural lighting applications. The AllStart design supports reliable performance across compatible ballast systems. Compatible with C185 ballast code and additional systems including M59, M165, M128, M135, and M172, this HID replacement bulb offers versatile installation options. With a rated life of up to 20,000 hours, it delivers long-lasting performance, reduced maintenance, and dependable high-quality light output.