Home » General » Rechargeable Umbrella Lights General Rechargeable Umbrella Lights August 15, 2007 86 This four-spot light discreetly clamps onto a patio umbrella, self-adjusting to fit any 1 3/8″ to 2″ diameter wood or aluminum pole. With 24 long-life LEDs, it provides up to 30,000 hours of soft, natural light. link