yea they can be a pretty big waste of money.....the only time i would put them on was if i was planning to do a LOT of night time trail rides.
the problem, as Larry/Leve says, is that they get knocked off and broken all the time......stick some on the bumper if you need more light......if you want them higher, put them on top of the brush guard.
once you spend more time on the trail you will see what works and what doesnt.......when you get to trails in the woods, you'll find that theres a lot of close calls with trees.....trees that break lights up there (as well as tear-up your soft tops, and crack hard tops, i broke my windshield from a stray tree branch last year.)
this all kinda goes into my original point that you should wheel a while before you start making major $$$$ mods. When i was talking to you earlier i mentioned rock guards/side skidz.....i think you should get those and then wheel it......
the lights and bumpers and lifts and tires and lockers and v8 conversions can come later...much later.
if you get stuff before you're certain you need it, chances are you'll get the wrong thing.
Winches are a great example.......they are great....but how many people REALLY need them...... I've had a jeep since 1998 (not all that long) but i've managed w/o a winch for a long time...... but thats one of the first things i wanted when i just got into jeeps....i thought they were sooo freakn cool (i also had a post on here in 1999 asking about putting a 401 into my CJ7, which woulda been a complete waste of time since i had a solid 258....but it sounded cool!).....
some people need winches.....some people really cant justify it...........wheel your new baby and find out what YOU need.......after a few trips with other jeep folks your priorities might change dramatically.
i think light bar will drop down in priority once you get some trail time.