Okay, I just found out the 170W only has 3 buttons. But you still should be able to manually turn off all lights.
Unless it is changed for the new model here is what my user manual said
Timer LED On/Off Cycle
You may programme the Maxspectâ„¢ LED Lighting System to turn on or off a group of LED bulbs. You can only set one timer for each group of LED bulbs.
1. Enter timer setting mode Press and hold the TIMER button down for more than 2 seconds to enter the timer setting mode. By default the first group of LED will be selected, its corresponding colored light will be lit, and an "œON" sign will be displayed on the Controller Unit panel to indicate the user can set the starting time.
2. Set the starting time Press the MODE button and the hour digit begins to blink, you can set the hour by pressing the +/WHITE or -/BLUE buttons. Once the hour has been set, press the TIMER button to switch to the minute digit. You can set the minute by pressing the +/WHITE or -/BLUE buttons.
3. Set the ending time Once the starting time has been set, press the MODE button to enter set the ending time. An "œOFF" sign will be displayed on the panel. Repeat the steps listed in item 2 to set the ending time.
4. Select the next LED group Press the MODE button to switch to the next group of LED, repeat the steps listed in item 2 and 3 to set the timer for this LED group.
5. Save the setting When finished setting the timer for all LED groups, press the TIMER button to save the setting. If you do not press any button for 5 seconds, it will also save the setting automatically.
Notes: Once the timer setting has been saved, it will restore automatically every time the unit is powered on, even after a complete outage of power.