This cordless solar stairway light earned The Best rating from the Hammacher Schlemmer Institute because it achieved the highest scores in every tested category. It produced the brightest light with 170 lux (a measure of light intensity) and after five hours continued to glow 99 lux, while lesser models only generated 61 lux and 19 lux, respectively. The Best unit outlasted all other lights tested, providing illumination for 21 hours, while inferior models went dark after 30 minutes. Rated as the most durable, it was dropped on asphalt multiple times and exposed to rain, sun, and frost over several weeks without sustaining any damage. Its superior features include a photo sensor that automatically turns the light on at dusk and built-in battery that recharges in moderate to full sunlight via its top solar panel. Includes two lights and mounting hardware. Stainless Steel. 41/2" L x 41/2" W x 1" D. (8 oz.)