Does it come with lights already attached?

Yes. The listing describes it as pre-lit with lighting included, so the lights are built into the tree. Check the box for spare bulbs and fuses.

How tall is it really?

The name says 7 ft, but the specs list 60 inches, which is 5 ft. Confirm the height with the store before ordering, since the two figures conflict.

What is the difference between the green and black versions?

Only the foliage color differs; both are pre-lit with a metal frame. The black version suits modern or themed decor, while green is the traditional look.

Is it suitable for a room with low ceilings?

A 7 ft tree needs roughly 8 ft of ceiling to leave room for a topper. If the tree is actually 5 ft, it fits rooms with lower ceilings.

The tree sections and the pre-installed lights are the core contents. A stand is typical for trees like this, but the listing does not confirm one, so check before buying.

Is this tree a good buy?

It depends on the height you receive. A pre-lit tree with a metal frame and a black option is a reasonable pick, but with so few sellers and no published light or tip counts, compare it to similar 7 ft pre-lit trees before buying.