Solenoid swicht???

[Egres]

hi

is there a solenoid out there that could be running 10h strait....

here my plan i wonna put 3 T5 on a ballast 2 that will run went the ballast is running and one with some sort of a swicht..... i was thinking about a solenoid but i dont know if they make one that could work for that or if i will just have to put a manuel swicht(the only problem is that i will have to put it on and off morning and night)

any body have tried this ???