Yes m8, absolutely no need at all. Just be sure that the timer you get is rated high enough to handle twice the wattage of your lights plus whatever else your running through it. Also be sure it will handle an inductive load. If you follow those two rules you will be fine. TBH you will probably struggle to find one that will handle less than 3kw (3000w) and won't handle an inductive load.
Glad it helped.
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