Black out filter greatly reduces visible signature. Low RFI (radio frequency interference) tolerance. Lights operate independently with on/off switches, allowing any combination of lights to operate. Durable Design Protects Lamp: Patented floating sockets, shatterproof, protective tube shield, twin lamp design. Electronic Ballast Efficiency: More efficient and lighter weight than magnetic ballast lights. Compact for easy transport and one person set up. Low Amp Draw. Low Heat Signature. Flicker Free, No Excessive Heat Build Up. Will Not Tax Field Generators Compliant with MIL-PRF-44259