Can I install it without an electrician?

It is hardwired, so it connects to a permanent outdoor circuit rather than a plug. If you are not comfortable with outdoor wiring, budget for an electrician.

How much area does one light cover?

Coverage ranges from about 54 to 161 sq ft depending on size and style. The spot beam is narrow, so plan on one fixture per feature you want lit.

Is it really waterproof?

It carries an IP65 rating, which means it is protected against dust and water jets. It is built for exposed outdoor mounting.

What color is the light?

It is warm white at 3000K, closer to an incandescent look than to cool daylight white.

The fixture with its integrated LED and mounting hardware. Wiring and a transformer or driver, if your circuit needs one, are not included.

Is this light worth it?

It is a reasonable choice for a hardwired IP65 LED spot with integrated LEDs, but only one store lists it, so there is nothing to compare against. Check that you have outdoor wiring before buying.