Itty bitty Edison style 1/4 Watt lamp with a 3/16"/5mm screw base. (type E5 or E5.5) 1/2" long overall it needs 160ma @ 2.5 V. It has a clear glass envelope that collimates the light at the end for greater intensity when viewed end on. Typically priced around a buck a each. Great for science fair projects. model railroading or anywhere tiny light is required.

Three words: Starsky and Hutch. You’re either thinking of that sweet red car with the white swoosh or the flashing light they stuck on the roof for hot pursuits. We don’t sell cars, but we have a 12VDC flashing amber LED with a magnetic base for the roof of a tow truck. Okay, it’s not a police light, but it’s still cool. Measures approx 4" x 4" with a 12-foot coiled cord that you plug into your vehicle’s cigarette plug. We’re not saying you should pursue anyone hotly, but if you need a safety light that you can put up and take down without scratching your paint, here it is.

No, not knives. These are bayonet bulbs, so named because you push them in and twist, just like mounting a bayonet. Our each is a 2-pack of 12V 8W bulbs, most likely for automotive use.

This red plastic tail light measures 3" wide x 2-1/4" tall x 1-1/2" deep (rectangular is the new round) with a 24" power lead. The mounting bolt is meant to be grounded. Draws 50mA at 12VDC. Ideal for trailers, go karts, scooters and DIY robot eyes.

From NAPA, packages of (2) high-temperature headlight sockets. You pick: #787110, 9006 2-wire, 1-1/8" wide x 5/8" x 1-1/4" deep with (2) 5" leads or  #787138, 9005 2-wire, 1-1/16" wide x 5/8" x 1-5/16" deep with (2) 6" leads.