Light wand - the most strip-like strip light. Once insanely expensive flash heads, half a decade ago these used to be fluorescent tubes, now LEDs appear to have taken over. Much like softboxes and striplights they allow for fairly lazy and careless "professional" lighting - at the price of soon growing stereotypical or even tedious. For personal use or to make art with I'd stay off them. But a commercial studio that will only pay off if it can turn out safely decent images at a high enough rate should have one or two - just don't get into these until you have enough soft boxes and point lights, a policy of "all fancy lights and no work lights" will eventually get you into a stew.
