Anything that produces light can be used for light painting. This could be the battery-operated fairy lights from Christmas or the battery-operated cupboard lights (https://www.pearl.de/a-NX9677-3306.shtml). LED chains with a battery compartment also work in the same way.
The following two photos show the light traces of cabinet lighting.
Even if you feel like you've been transported straight back to the 80s, the old fiber optic lamps offer interesting possibilities for light painting.
The best fiber optic lamp is the one you can't see. In other words, if the glass fibres are dyed black, they become invisible and only the colored points of light at the end are visible.
An inexpensive variant is available at https://www.pearl.de/a-NC2051-3331.shtml
Battery-operated light whips are well-known among ravers in the techno scene. These are available with different quality levels
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We can also conjure up trails of light with sparklers. Here you have to pay attention to the burning time and make sure that you don't light anything accidentally or ignore the risk of injury.
Since sparklers are sold all year round, you can use them at any time. Please pay attention to the burning time when buying.
Also an option that is very inexpensive and available in different colors. The glow sticks do not shine as brightly as a flashlight, but they can create a beautiful effect. The image effect of glow sticks can go in the direction of colored smoke.
Beautiful drawings can be made with the short flashlights. Quickly interrupted patterns are also easily possible here - more information on LEDs and why dimming down flashlights for light painting does not work or only partially works.