Professional manufacturer of customized LED light strips since 2012.
Why do light strips need to be powered at both ends? Jomo reveals the secret behind it!
2025-06-18
When you install an extra-long LED light strip, have you ever encountered the trouble of uneven light brightness? It is dazzling at the beginning, but obviously dim at the end? This is not a quality problem of the light strip itself. The core problem lies in the electrical phenomenon of "voltage drop", and powering at both ends is the efficient solution recommended by Shenzhen Jomo Lighting Technology Co., Ltd.!
Voltage drop: the "invisible killer" of long-distance power supply
Imagine that the current is like water flowing in a long pipe (light strip circuit). The longer the light strip, the more obvious the resistance of the internal conductor, and the greater the resistance to the current. According to Ohm's law, the resistance consumes voltage, resulting in the actual working voltage at the end being much lower than the starting end. When the voltage is too low, the LED chip cannot obtain enough energy, the luminous efficiency drops sharply, and the dim phenomenon occurs.
Imagine that the current is like water flowing in a long pipe (light strip circuit). The longer the light strip, the more obvious the resistance of the internal conductor, and the greater the resistance to the current. According to Ohm's law, the resistance consumes voltage, resulting in the actual working voltage at the end being much lower than the starting end. When the voltage is too low, the LED chip cannot obtain enough energy, the luminous efficiency drops sharply, and the dim phenomenon occurs.
Double-ended power supply: the secret to uniform lighting
Shenzhen Jomo Lighting Technology knows that the best strategy to combat long-distance voltage drop is to connect the power supply at both the starting and end of the light strip (i.e. "two-end power supply"):
1. Shorten the current path: the current does not need to travel the entire length of the light strip, and the effective distance between the power supply points is greatly reduced.
2. Significantly reduce the voltage drop: the path is shortened, the resistance effect is sharply reduced, and the terminal voltage is effectively guaranteed.
3. Uniform brightness: the light strip obtains sufficient and stable working voltage throughout the entire process, and each LED can shine uniformly.
Shenzhen Jomo Lighting Technology knows that the best strategy to combat long-distance voltage drop is to connect the power supply at both the starting and end of the light strip (i.e. "two-end power supply"):
1. Shorten the current path: the current does not need to travel the entire length of the light strip, and the effective distance between the power supply points is greatly reduced.
2. Significantly reduce the voltage drop: the path is shortened, the resistance effect is sharply reduced, and the terminal voltage is effectively guaranteed.
3. Uniform brightness: the light strip obtains sufficient and stable working voltage throughout the entire process, and each LED can shine uniformly.
Choose Shenzhen Jomo to light up excellent quality
For light strip projects over 5 meters, especially high-density and high-power models, single-ended power supply is very likely to cause uneven brightness. Shenzhen Jomo Lighting Technology Co., Ltd. focuses on providing high-performance LED light strips and professional lighting solutions. We are not only well versed in the core technology of light strip power supply, but also can tailor efficient, stable and uniform light strip power supply solutions for you to ensure that your lighting project is dazzling from the start to the end.
For light strip projects over 5 meters, especially high-density and high-power models, single-ended power supply is very likely to cause uneven brightness. Shenzhen Jomo Lighting Technology Co., Ltd. focuses on providing high-performance LED light strips and professional lighting solutions. We are not only well versed in the core technology of light strip power supply, but also can tailor efficient, stable and uniform light strip power supply solutions for you to ensure that your lighting project is dazzling from the start to the end.
Contact Shenzhen Jomo Lighting Technology immediately to get professional light strip power supply design and product support to make the uniform light perfectly presented!
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Contact person: Bob Zhu
Email: jomolighting@jomolighting.com
Email: jomolighting@jomolighting.com
Tel: +86 15989421053
Company Add: 6th Floor, Building 8, Shiguan Industrial Park, Minsheng Avenue, Gongming Town, Shenzhen, China