Is this light dimmable?

No. It is not dimmable from a wall switch. Brightness is adjusted at the fixture through Kichler's Variable Lumen Output, so you set the level during installation.

What transformer do I need?

It runs on 12V DC and draws 12 watts, so any 12V landscape transformer with enough remaining capacity works. Add up the wattage of every fixture on the run and stay under the transformer's rated load.

How bright is it and what color is the light?

It puts out up to 835 lumens at 3000K, a warm white close to halogen. The 35-degree beam is a flood pattern, good for accenting walls, shrubs and architectural details.

Can it be used near water or in rain?

Yes. It is cETLus listed for wet locations and uses tempered glass, so it is rated for exposed outdoor installation.

What comes in the box?

The fixture, its ceiling/wall mount and the LED module. Assembly is required, and general mounting hardware is not included, so plan on supplying what your surface needs.

Is it a good value against other brass 12V LED accents?

It gives 835 lumens and adjustable output from a 12W LED in a brass, wet-listed body. Many brass 12V accents from Kichler and similar brands deliver less light or fixed output, so it holds up well on features for the money.