The Federal Signal patent pending G-Series Strobes feature a high-intensity xenon strobe tube operated at 21J. The housing is made from non-metallic materials designed to serve the demanding needs of offshore marine and land-based industrial applications and long-term maintenance. The flameproof "EX d" versions come standard with two (2) M20 entries. The G-Series Strobe can be combined with all other G-Series audible and visual products in several custom configurations.