Originally Posted by MoneyMitch
to touch on k rating briefly, plants can use greens blues and reds you can lookup a kelvin chart to see which ratings give which colors and how much.
as far as being able to tell if plants are showing deffiancys they will tell you what they are lacking or getting too much of by their appearance. Keep in mind it is normal for plants to drop leafs as they are constantly growing new, but a large leafs drop off means something is up usually. Are you seeing anything with your plants that is raising concern?
The bulb is 6500k, 20W
The java ferns leaves mostly all have brown spots. I think all the Mexican Oak died already. The anacharis looks good, the java moss looks nice but is slow growing after being in there for a few months. The hornwort is good. I just added an Amazon sword and thats looking sadder each day but I know some say that the leaves will die then grow back after moved to different tank sometimes.
Something about the Wisteria is making me think lighting is an issue. The leaves at the top look great, nice and green, and the leaves are close to each other on stem. But as you go down the plant there are fewer leaves that look sad and there are barely any leaves at the bottom. I have read that when there is far spacing between the leaves on the stem that there is poor amount of light, or is this just natural for Wisteria?