1) Installed the light on horizontal surface that have enough strength. 

2)When installing, pls don't put the photocell face the nearby light source, also can't be hidden by the nearby objects.

3)the identification of the line, lamps with one four-core cable: the brown and black line is the power line, the brown wire is the live wire (L), the black wire the null line (N); the yellow-green wire is the ground wire.

4)Connection:

A: When the lamps use single, the brown wire connect to the Live line, black wire connect to Null wire,, then the light could work normally;

B: When more than one lights need to synchronization, all the lights' brown wire connect to the live line, all the black wire connect to the null line, could arrive synchronization flashing.

5)for the GPS synchronization function test, pls do it outdoor and no shade environment, it will need about 10 minutes.(Only for the GPS synchronization type)