SolisTek STK1001, for 1000 watt applications. The 4-step dimmable ballast with Ignition Control™, Sequential lamp ignition technology. Multi wattage capable. 90-260v compatible. SolisTek Digital Ballasts are tuned for minimal Total Harmonic Distortion (THD%) output to lamps. SolisTek ballasts offer the cleanest burning ballast the industry has to offer. The results are longer ballast and lamp life and less depreciation of lumen and par output over time. SolisTek ballasts also offer the industry’s only true Ignition Control™ staggered ignition techology. Pre-ignition self-diagnostic checks. SolisTek SenseSmart™ which will check for 8 different factors before attempting to power the lamp. This is intended for increased user safety.