The majority of LED drivers only become significantly less efficient when dimmed below 70%. Actually, you might just lose a few percentage points of driver efficiency at 50% power, but you might gain 5-10% with the LEDs, so you’re still ahead!
The most crucial step is to start with an LED grow light that has an effective driver. Some less expensive LED drivers are only 85–90% efficient, or less, but the finest LED drivers have efficiencies of 95–96%.



