When gardeners upgrade to a Lumatek Digital Ballast, they"ll see the benefits instantly! From their increased efficiency to their increased lumen output, digital ballasts truly are the next big leap in indoor gardening technology. Compared to traditional magnetic ballasts, Lumatek Digital Ballasts lose less power from outlet to lamp, provide light at a far more stable level, start up faster (full light in under one minute!), and reduce the noise a system generates by running silently.