The flashing frequency of stage lights and the points to note when purchasing

The flashing frequency of stage lights and the points to note when purchasing

First, the influence of the frequency of light flickering on the stage effect

Stroboscopic frequency and visual effects

Low-frequency flash (1-20Hz) : It is often used to create a sense of rhythm, for instance, in concerts, it can be used in conjunction with the flashing of drumbeats to enhance the visual impact. However, it should be noted that low-frequency flashes ranging from 3 to 70Hz may cause eye discomfort or headaches in highly sensitive people.

Medium and high frequency flash (100-500Hz) : Although it is hard to detect with the naked eye, it may indirectly cause tension or fatigue in the eye muscles. When making a purchase, priority should be given to choosing lamps without flicker to ensure that the flicker percentage is less than 8%.

Ultra-high frequency flash (>1kHz) : It is mostly used in high-speed photography or for special lighting and shadow effects, such as the magic of "freezing time", but it needs to be used in conjunction with professional equipment.

Stroboscopic and Security

Stroboscopic safety of laser lights: During laser performances, the laser beam needs to be scanned by a high-speed galvanometer to reduce the power density per unit area. When making a purchase, it is necessary to confirm whether the laser light has the "laser scanning out-of-control protection" function to prevent the laser beam from accidentally being stationary and causing harm to the eyes.

Stroboscopic effect and Epilepsy Risk: In the UK, there have been cases where epilepsy was induced by 25Hz stroboscopic effect. Industry regulations clearly stipulate that stroboscopic devices in public places must be equipped with frequency warnings and the use of the dangerous frequency band of 8-15Hz is prohibited.

Second, when purchasing stage lights, pay attention to the frequency of light flickering

Clarify the stroboscopic requirements

Determine the stroboscopic frequency range according to the type of performance. For instance, a rock concert might require low-frequency stroboscopic effects to enhance the sense of rhythm, while an immersive performance needs to avoid any stroboscopic effects to reduce discomfort for the audience.

Test the stroboscopic effect of the lamps to ensure that it matches the rhythm and atmosphere of the performance.

Pay attention to stroboscopic control technology

Drive circuit optimization: High-quality lamps optimize the drive circuit to keep the stroboscopic fluctuation depth (SVM) below 0.4, ensuring that the stroboscopic percentage is less than 8%.

Intelligent control system: Lamps supporting the DMX512 protocol can achieve precise control of stroboscopic frequency and waveform, meeting the requirements of complex scenarios.

Verify the stroboscopic safety

Laser light safety: Confirm whether the laser light has the "laser scanning out-of-control protection" function and verify its effectiveness.

Flicker percentage detection: Use professional instruments to detect the flicker percentage of the lamps to ensure they meet safety standards.

Consider the long-term usage cost

The impact of stroboscopic effect on the lifespan of lamps: High-frequency stroboscopic effect may accelerate the aging of lamps. When purchasing, the heat dissipation design and material of the lamp should be considered to ensure its long-term stable operation.

Maintenance cost: Lamps with complex stroboscopic functions may require more frequent maintenance, and their long-term usage costs need to be evaluated.

Third, the stroboscopic characteristics of different types of stage lights and purchasing suggestions

Stroboscopic lamp

Features: The stroboscopic effect is achieved through precise control of the light switch, with a frequency range typically from 1 to 200Hz.

Purchase suggestion: Give priority to choosing stroboscopic lamps that support the DMX512 protocol to ensure that their stroboscopic frequency and waveform can be precisely controlled. At the same time, pay attention to its heat dissipation design and materials to ensure long-term stable operation.

Laser lamp

Feature: The laser beam achieves a stroboscopic effect through high-speed galvanometer scanning. The greater the power, the higher the danger.

Purchase suggestion: Confirm whether the laser lamp has the "laser scanning out-of-control protection" function, and verify whether its stroboscopic percentage and spot diameter meet safety standards. Meanwhile, consider its interactivity with the performance content.

LED lamps

Features: Achieves stroboscopic effect through PWM dimming, with a wide adjustable frequency range.

Purchase suggestion: Choose LED lamps that support high-frequency PWM dimming and ensure that their flicker percentage is less than 8%. Meanwhile, pay attention to its color rendering index and color temperature adjustment range to meet different performance requirements.