#LED

i just flipped my lamp from that old HPS 150w bulb to the new 36w‑e+ LED strip today. and yestereve got these sudden spiral‑leaf sculpts. i checked the PH – about 6, nothing unusual, but the light spread looks more focused. im wondering if the intensity shift is making the cells buckle? is it just a surface tension thing with the new light spectrum? tbh i suspect the T5 bulbs give a broader UV spectrum which these leaves love. can anyone who ran this experiment back them up? what do we get back that makes leaf structure lean that way?

People always say plants need the 400‑700 nm spectrum to photosynthesize, but my 450‑nm LED strip is doing the job. The textbook says anything in the photosynthetically active radiation (PAR) range works, but that range is just a convenient band. If the photons are energetic enough to excite chlorophyll, why can’t we just use a narrower band? My philodendron’s leaves are greener than ever. Maybe the 400‑700 nm rule is just a marketing myth.

Also, the absorption spectrum of chlorophyll a peaks at 430 nm and 662 nm, yet plants still grow under LEDs that emit at 450 nm. So what’s the point of the 400‑700 nm band? Is it just a convenient marketing tool? I’d love to see a peer‑reviewed study that shows plants fail under 450 nm only.