They say “rust never sleeps”. When storing firearms you want to maintain optimal interior temperature and relative humidity inside the safe. By keeping the humidity above the dew point, moisture won’t condense on your guns, leading to rust. Here’s a simple, Digital Humidity & Temperature Monitor that costs just $14.95. With a 3″ x 2″ footprint, it’s small enough to put anywhere in your safe.

Shown below is a slick, battery-powered LED light. The LED lamp holder swivels, allowing you to direct illumination where you want it. This unit, measuring 7.1″ x 1.8″ x 0.9″, is very flat so it doesn’t take up much space. Mounting is easy — the lamp comes with both magnetic and Velcro-type fasteners. Because this lamp uses LEDs rather than incandescent bulbs, the AAA batteries last a long time. This swiveling LED lamp, in either silver or gloss black finish, costs $12.95 on the web and you may find it for less in a large home-supply store.