Some one please help with Led lighting

[AquaScapeOnline]

Hi Guys, Im new here and was looking for some help, I own an aquarium store and am looking to change the lights over the aquariums. I am currently running T5 4ft 10k bulbs over all my aquariums, My problem is they are old and some of the light fixtures are going bad. I wanted to replace all the lights with leds. I purchased some from ebay 15 ft 300 led strip lights 5050. The problem is they are not bright enough (Doesn't come close to the t5)
Is there a Strip that is brighter or close to the output of the T5s? Some one please help.
Thanks in advance,
Pedro