Take photos with ordinary 20W led lamp, which is always very dark. Is it a lamp?

This kind of lamp can't be used for photography. Visually, your light bulb is inferior. At present, the efficiency of high-power LEDs used in LED bulbs is roughly equivalent to that of energy-saving lamps, which is about 0/50 lumens per watt/kloc. Yes, you are not mistaken. LED lamps are not more energy-saving than energy-saving lamps. The 20W LED lamp generates so much heat that it can never be made into a light bulb. LED and fluorescent lamp are different. Fluorescent lamps need high temperature to achieve high efficiency. LED chips are afraid of heat, and overheating will burn! It is the limit for LED bulbs to achieve 10W. This 20W LED bulb on the market is either a dummy parameter or a fake.

For the LED light used for photography, you need to use a flat-panel photography light, so that the light can be softer, and the light bulb is a point light source, which is easy to cause shadows. However, the price of this flat LED lamp is still quite expensive. A flat-panel photographic lamp with 40x40cmLED lamp, minimum 1000 yuan. The biggest advantage of LED lamp is that it is light in weight, easy to move and not hot. If it is used for fixed photography, it is better to use the studio flash directly.