Lumatek 1000W 400V HPS DE Globe This Double-Ended (DE) pulse-start lamp, has been engineered for use with Lumatek 1000W Pro 400V electronic ballast and is produced using high-grade ceramic arc tube technology and specific horticultural gas blend that creates optimal spectral output for healthy plant growth. Double-ended HPS lamps are more stable than traditional, single-ended HPS lamps and this allows them to have a 10% increase in light intensity and PAR/PPF output. The increased light intensity also enables this lamp to be positioned further from plant canopy increasing light footprint & light uniformity if desired. The PCA ceramic arc tube permits the lamp to operate at higher internal temperatures increasing colour rendering, output and efficiency. PCA resists interaction with the chemicals inside the tube which stabilizes the chemical mix over the life of the lamp, thereby improving colour consistency and PAR/PPF level maintenance. Pulse-start technology enables faster start up & restrike time, longer lamp life and increased lumen maintenance.