Oh, groan, this is so tedious, Jerry. It's a self-explanatory picture (but see below)!
Ok. The scene he was faced with is larger than what's in the frame. So he's selected where the frame is and what's in it. He's paid attention to the light (and might've modified it but we don't know that). It's title by the way is Cheddar No5, from the series Everyday Icons, 1985 or 6, on film, dammit, but let's concentrate. The background is dark and extends as said beyond the frame - doesn't that make you curious? It is enigmatic! We are suspended, our knowledge is incomplete. So there's a quiet but creative tension. It's all very visual. And the buckets are lit so softly that the plastic almost looks creamy. They are the central counterpoint, not necessarily more important than the background, but probably what most people pick out first. So there's visual dialogue betwen buckets and background. Why are they placed just as they are? Another unknown for the viewer, another part of the quiet enigma. What's the nature of the space, who put the buckets where they are?
Blimey, mate! It's all there in front of you! It's a very unassuming picture, but has integrity, and it's distilled - there's nothing unessential there! What do you want, fireworks?