just make sure when you wire them in series you are not exceeding any watt specs because you will be adding resistance in a series circut...
example if you have five, five foot long sections at 5 ohms per foot that is 25 ohms per shelf total load of 125 ohms of resistance in series
and in parallel you will have 25 ohms total load....
this is assuming 5 foot is 5 ohms i have no idea...but in series you add all the resitance together...just be carefull