Effulgent. Acetous. Sacchariferous. Pungent. Ecstatic. Palatable. Convivial.

If you were to change the lighting to black and white this photo would not have the same vibrant feel. The goal of this photo is to make the viewer want lemonade or something lemon flavored. This color for most people make them happy and think of bright light like the sun. Nuance - you could change the shade of yellow to a dull yellow. This subtle variation would make the lemon less appealing and possibly come across as being rotten.