There are four important parameters that can be used as judgment criteria to see whether the quality of the Shadowless Operation Lamp in the hospital is good. When doctors perform surgery, the requirements for lighting lamps are very strict, and ordinary incandescent lamps cannot meet the requirements. The main reason is that ordinary lights will have shadows, which will affect the effect of surgery.

The Shadowless Operation Lamp specially designed for surgery can achieve a shadowless effect, so that when the doctor performs the operation, there is no need to worry that there will be shadows covering the wound site, which will affect the treatment process. So, how to evaluate the quality of Shadowless Operation Lamp? What standards should the surgical shadowless lamp meet?
1. The illumination distance and illumination depth of the shadowless lamp
Usually Shadowless Operation Lamp manufacturers will give the illumination distance and depth of shadowless lamps. The illumination distance of most shadowless lamps is about 70--140 cm, that is, the shadowless lamp has the best shadowless effect within this distance. Generally speaking, the larger the lamp panel of the shadowless lamp (single head lamp) or the more heads, the better the illumination depth, and the more suitable for relatively deep surgery. This is also the reason why larger surgical lamps or shadowless lamps with multiple lamp heads are often chosen for some relatively complex large-scale operations.
2. Illumination and color temperature
This parameter mainly describes the illumination intensity and light color of Shadowless Operation Lamp. Usually, the light of the ideal shadowless lamp is similar to sunlight. At about 4400--4600K, the best effect under this color temperature can clearly distinguish the tissue structure, and it will not cause the eye fatigue caused by the doctor's long-term operation.
3. The number of joints and the stability and flexibility of the lamp arm
In order to facilitate the shadowless lamp to illuminate various parts of the lesion, we hope that the more joints of the shadowless lamp, the better, and the greater the rotation angle of each joint, the better. But the shadowless lamp can't move infinitely, and we don't want to run away as soon as it touches the shadowless lamp, so we can't fix the position for the shadowless lamp. Usually we define the degree of freedom of the shadowless lamp in this way, that is, when the external force we apply to the shadowless lamp is less than 20 Newtons, the shadowless lamp should not move, and as long as the external force is greater than 20 Newtons, the shadowless lamp can move at will.
4. Temperature rise and high temperature stability of shadowless lamps
Temperature rise is such a concept, which refers to the increase in the temperature of the patient's lesion area per unit time when the shadowless lamp illuminates the patient's lesion. Due to the sensitivity of temperature to infection, it is usually required that the temperature rise of shadowless lamps should be less than 2 degrees per hour. The same temperature has a great impact on the electronics, circuits, and bulb life in the lamp. Statistics show that the vast majority of surgical shadowless lamp damage is related to temperature. In this way, the heat dissipation of the shadowless lamp itself and its high temperature stability after long-term use have also become an evaluation standard. Some lamps will adopt some own design or infrared heat absorption to improve their performance.
Therefore, no matter what kind of Shadowless Operation Lamp, these four standards must be met.