Sync timer on black box leds

[badd]

Hey guy/gals... I have 2 of the Chinese 165w wifi black boxes... " I love them".
Seem to have a issues with keeping them in sync.. I can set the time on both lights... they work perfect for a week or two.. then they slowly start get out of sync...with in 3 weeks.. they will be 30 seconds off of each other..I know 30 seconds is not bad..but OSD kicks in..and I have to reset time on the units..anyone else have a problem with these type of lights not staying in sync?
these are the lights
http://www.ebay.com/itm/161749501856

 

[Reefing Madness]

Leave them on, and plug them into a wall outlet timer instead.

 

[Flippers4pups]

As stated, a wall timer will keep them in sync.

 

[badd]

Leave them on, and plug them into a wall outlet timer instead.

Then I would only lose the ramping..and we know that is not needed.. but its a thought.. I put 2 power heads on timers..

 

[Reefing Madness]

Yea, if your ramping, then its going to be an issue.

 

[badd]

Yea, if your ramping, then its going to be an issue.

I like the ramping..but how much does it really benefit the tank.. beside not scarring the fish..with instant on..