Short plants...raise light?

First time grower…My plants look good but they are not getting any height to them. Should I raise the light to get them to stretch?

Canna Haze by MILF (can’t find any info on this strain)
5 gal pot with FFOF
14 days old
HLG 300Rspec 8" over plants 18/6
No PH meter yet
Temps between 75 and 83
Humidity between 55 and 65

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Raising or turning down your light can encourage the plants to stretch out. I agree that node spacing is too tight and should be addressed.