Complete Set of Longer Life Bulbs/Heating Elements 1500 watt EdenPURE GEN4 & USA1000 Bulb Kit Complete 10%-25% Longer life than OEM Sylvania Bulbs/Heating Elements 500 Watts Each x 3 = 1500 Watts Total Longer life and yet lower price than a set of OEM bulbs! Compatible with EdenPURE GEN4 USA1000 US1000 A4428/RTL Personal Heater PersonalA4887/RTL Space Saver USA1000A4188/RTL