i did a quick search of the first light and you only get 8 total that means 4 going across. with the nova you get 6 across, what you need to make sure is your tank is wide enough for either fixture. your tank is 18" wide, i have no idea how wide the nova one is, but check on that. and its hard to tell but it looks like the t5 dont have individual reflectors on it, which is pretty important for t5s. cant really say either way maybe someone else can chime in if they ever had experience with the first light or the second.
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