I don't generally get in to "light" wars but i ran up on something i did not expect.
I also needed to replace all of my T5's (all at the same time).. I think if you do the math the KIND light bars for veg are quite powerful. They provide a very wide spectrum but heavily favored towards the blue end for vegetation phase (including that usually provided by standard T5). I did the math on the overall cost, wattage consumed vs output and wavelength. i could use 2 light bars to get the same or better output at less cost. Yes they are LED's. If you watch a video made under the light you will notice that the diodes actually switch their pattern every couple of seconds.