The Philips LED PenLight is an oversized pen-style pocket light that houses six powerful light emitting diodes (LEDs) and provides outstanding visibility emitting 250 lux/120 lumens of super bright white light. An additional LED focus light on the tip serves for more precise illumination. The durable housing protects from water and dust, and is chemical resistant. Powered by three AAA batteries, the Philips LED PenLight provides up to 11 hours of non-stop use. Philips LED powered lights are ideal for everyday work environments because when people see clearer they can work better.