my way of using my TWO 8 modes are either:

- 1 solid in front (only last 2 hours at HID MAX) + 1 at rear (with a red layer) blinking real fast (police mode) car/truck drivers will avoid you like a plague.

- both at the front, and both flash blinking, turn the 2nd one on after a few sec, so that each will fill up the OFF time of the other. This translates into a longer ride at MAX light conserving energy.

The only annoying thing of that mode is that, your eyes will become annoyed after a few hours, even having 2 of them going in tandem, there are still those fractions of a sec that will be darker than "normal"

but if that doesn't bother you, then you can go on for about 4 to 6 hours straight at MAX flashing light.

is good for oncoming traffic