Increase your visibility while eliminating the risks associated with incendiary roadside safety devices. The Visi-Flare features: advanced strobe technology, long flash life on C- or D- cell batteries, a rugged shockproof body and incredible light output. Plus, its fast set-up, ease of use and exceptional visibility make it ideal for traffic control. The Visi-Flare has a battery life of 16 hours with two D- cells (18 w/ reduced flash rate) eight hours with two C- cells ( 10 w/ reduced flash rate). Note: Use of C-cell batteries in the Visi-Flare WP requires the Visi-Flare C-Cell Adapter (sold spearately).