Lumiline lights actually look like fluorescent tubes because they are white, long, and thin. They don’t have pins on the end of them, though. On the bases, there is a dimple and a rim that attaches to caps from your light fixture. They actually have a long filament that runs all the way through the bulb, which is definitely not fluorescent technology. They come in 20 watt, 30 watt, and 40 watt models, all of which are different lengths. You can also get them in clear or frosted, though most often they are covered by a plastic molded cover that is part of the fixture and the finish can't be seen. If you're thinking "Gee, I should buy one of these fixtures." you're not alone, but they can be very hard to find.
Lumiline light bulbs do not come with caps and this is important to keep in mind when you remove a burned out bulb from your fixture. Remove the caps on each end, and save them so you can install them on your new replacement bulb. I don’t currently know of any source that offers replacements for these caps; if you happen to know of a source, please email me! ;)
People love their Lumilines! The fixtures that they are used in are classic and typically cherished by home owners, and I completely understand that. My mother-in-law has a fixture that uses them in her bathroom, and I particularly love the warm, even glow the bulbs produce. The way they pop on and off and the actual switch on the fixture is so unique; there’s nothing like it available today. Since the Lumiline light bulb is only used by a small number of homes, it’s not typically in local stores. Here’s the problem for me since I am in the lighting business: who do you suppose my mother-in-law calls when she needs more Lumiline bulbs for that bathroom fixture? Sounds like an excuse to see the grandkids to me! =)