This tube could provide radiation shielding for a future underground lunar colony.

To keep the equipment dry, a tube in the back provides drainage from the plant containers, which are made of polyethylene.

The tubes used provide a purer tone than solid cylindrical chimes, such as those on a mark tree.

Fluorescent tubes provide a daylight-quality light, stay cooler when used and cost very little to run.

These tubes provided significant performance increase in gain but very little in the way of resolution.

The chairs' upholstery is peeling away and bare fluorescent tubes provide the lighting.

Smaller inlet tubes provide ram air to pressurize the fuel tanks.

Ideally, a four-ounce tube should provide four applications.

But thanks to advances in triphosphor chemistry, color-correcting fluorescent tubes now provide a warmer light.