Review on Dimmable USB Powered LED Bulb Night Light (7W) - Ideal for Home Reading, Camping, and Emergencies by Chris Mania

works exactly as described and is one of the first USB (5V) PWM dimmers I have received that does not flicker noticeably at the lowest settings. Lamp power or maybe Lux is a little high. Based on the boost and relative brightness compared to other LED bulbs, this appears to be closer to 4W. However, if the price was a little lower, I would order again without hesitation.