The author noted that the three metal halide lamps he was given for testing were comparable to 20-45 simple bulbs. The luminous flux in the tested models was equal to 7800, 13000 and 17500 lumens. What else are the features of such lamps? First of all, they have high efficiency (up to 111 lm / W), as well as high white light color rendering indices that they give out.
In addition, you need to purchase an additional driver for such lamps. When the driver turns on, the lamp “adjusts” for a while, and then, after a minute, it starts to shine evenly – with white light. It is important that the light bulb after turning off can only be turned on again after it has cooled down.