Product details:

An internal rechargeable battery powers the lamp for up to 10 hours after a 10-hour charge via the included AC adapter. The lamp has 48 LED bulbs that cast bright white illumination without the glare and distortion produced by an incandescent bulb's yellowish glow. A flexible gooseneck can be raised, lowered, or twisted for optimal positioning over a book, computer screen, or crafts. The lamp has a brass-plated base, pole, and shade, and a dimmer dial provides smooth transitions between light levels. Bulbs last 50,000 hours. 20" H x 8 1/4" Diam. (7 1/2 lbs.)