Does my plant look healthy? It is approx 13” hig...

It's hard to tell under the purple lights, however the fan leaves look healthy and no burn. If I was you I and growing with LEDs I would try to get as much spread as possible of the branches. Possibly looking at a trellis to set the canopy level at approx 15" (63" minus distance from plant to the light then divided by 3 because the plant can double to triple in height.. 63-18÷3) Those Led won't get much depth penitration. So your best bet is coverage. You can probably top it or fim to get 4 terminal stems per plant, this allow You to spread it out under the net. Just remember depending how sativa dominant the plant is it can triple in size. Better to be a boy scout and plan for the worst and hope for the best. Those fan leaves are very Indica Dominant looking so this plant may only double in size, it just impossible to know until you flower out and see for the first time.