To reach the 24 hour light setting on the AG7 classic (not elite, deluxe, extra, pro 100 etc) take the following steps:
1) Press “select” until you reach the “Strawberries” or “Advanced Settings” button.
2) Press and hold “select” until the light next to the “Strawberries” or “Advanced Settings” button starts to blink (about 5 seconds).
3) Release the “select” button. Lights will now stay on 24/7 until the select button is advanced again.
24 hour light settings give a boost to early vegetative growth for most plants. Use for the first month or so for bushier growth of lettuce, tomatoes and herbs. Be sure to switch off 24 hour growth for best results after the first month.