The Barefoot Go portable solar light has been specifically designed to meet the needs of rural markets. It has multiple brightness settings which allows the user to conserve power. It includes a 1 Amp USB output capable of charging smart phones and other devices. The product's versatile design and stand makes it perfect for any location and situation. The poly crystalline solar panel of 2.5 W is combined with microprocessor-controlled battery management to maximize battery performance and life. The sleep mode feature of this product requires you to press the power button for 10 seconds and the lamp will enter a sleep mode to conserve power. It is an energy efficient product.