Here comes a do it yourself tip for a portable striplight (basically build from a standard scientist equipment). Just insert a white or silver paper into a transparen poster roll by leaving a 5 cm gap between the paper ages for light outlet (my one comes from a company called “Rumold” and can be bought at Amazon although I bought mine 10 years ago at Theresienstrasse/Munich). Then insert the flash reflector into the upper aperture that’s it. Setup time is <1min, costs are <15€, weight is approx 440 gram including paper, effective light outlet 92 cm.