Could be. I blast my plants prety hard in flower. If im at full go like at flower time or couple days after flip then i dont see a lot of stretch either. To me its nice gives fatter buds and less gaps between the buds. Too much light isnt good but too little is worse lol. However i did recently purchase a cheapo ppfd meter off amazon and am going to start to see if i see differences in all aspects using a meter keeping lights dialed in good vs how my eye and mind say do it. Lol. Long as all seems good with the plant i wpuldnt stress it. Keep up with what ur doing. Leaves r not dark or light green are they. They dont feel ir appear to be crispy at all. If not keep on keeping on brotha. Dont fix whats not broken. Lol
              
              
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