Growers Choice DE 600W MH 4K Grow Lamp. 800 µmol/s. 4000K Transitional

Growers Choice DE 600W MH 4K Lamp: Transitional Spectrum at 800 µmol/s The Growers Choice DE 600W MH 4K runs a 4000K metal halide spectrum at 800 µmol/s photon flux with 60,000 lumens of initial output and 100 lm/W efficacy. That 4000K sits warmer than a standard veg MH but cooler than bloom-focused HPS — a transitional color temperature that works well toward the end of vegetative growth and the opening stretch of flower. The balanced blue-to-red ratio helps plants transition smoothly without the abrupt spectral shift that comes from swapping straight from a 6000K MH to a 2000K HPS. Quartz Glass Construction and 600W DE MH Lamp Specifications Quartz glass construction maintains consistent spectral output and PAR production through the lamp's rated 6,000-hour life, with 90% lumen maintenance at 5,000 hours and only 5% degradation at 10,000 hours. The UV component in the spectral output supports enhanced resin production during the early bloom weeks when secondary metabolite pathways are activating. Physical dimensions sit at 388mm × 32.5mm at 5 oz, fitting standard 600W DE fixture platforms. Operates at 110V / 6.0A on ANSI-S106/E ballasts with a CRI of 65. Burning position is horizontal ±15°. Not recommended for use with Nanolux dimmable ballasts. Key Features 4000K Transitional Spectrum: Sits between veg and bloom color temperatures, helping plants transition smoothly from vegetative growth into the flowering stage 800 µmol/s Photon Flux: Delivers strong photon output from a 600W draw for substantial canopy coverage during the critical late-veg and early-bloom transition UV Spectral Output: Includes UV wavelengths that support resin and secondary metabolite production as plants shift into flowering metabolism 90% Lumen Maintenance at 5,000 Hours: Holds output consistency through the majority of the lamp's service life before replacement becomes necessary CRI 65: Higher color rendering than standard HPS means more balanced spectral distribution across visible wavelengths for natural growth patterns Technical Specifications Specification Value Lamp Type Metal Halide (MH) Wattage 600W Configuration Double-Ended (DE) Color Temperature 4000K Photon Flux 800 µmol/s Lumens (@ 100 hrs) 60,000 Efficacy 100 lm/W Rated Life 6,000 Hours Lumen Maintenance 90% at 5,000 Hours CRI 65 Lamp Dimensions 388mm × 32.5mm Weight 5 oz Operating Voltage 110V Operating Current 6.0A Ballast Standard ANSI-S106/E Burning Position Horizontal ±15°