The power extension cord has been shortened in the new Mars Hydro LED models under 480W for two main reasons: 1. Improved Heat Dissipation: The new LED models below 480W feature advanced heat dissipation technology. This eliminates the need to place the power supply farther away from the light for cooling, reducing the necessity for a longer cord. 2. Customer Feedback on Portability: Many customers expressed that the longer power cords in older models were inconvenient to organize and store. The shorter cord in the new models enhances convenience and makes the setup tidier. This update is specific to the new LED models under 480W and reflects our dedication to improving product design based on user feedback.