Most dorm-room LED lights are powered by USB, by batteries (commonly 3×AA), or by a standard AC plug-in power supply.
Many plug-in nightlights use built-in light sensors (dusk-to-dawn) that automatically turn the light on at dusk and off at dawn. Simpler models offer a single manual on/off setting instead.
Integrated LEDs in the plug-in nightlights reviewed list a rated life of about 30,000 hours.
Strand lengths typically range from about 5 feet up to roughly 30.8 feet. Other common lengths shown include examples like 11.3 ft, 14.56 ft, and 16 ft.
Options include multicolor/color-changing strands, adjustable white-tone strips (one listing shows a 2000K–7000K range), and simpler fixed warm-white or clear LEDs.
Some plug-in nightlights are listed with UL or ETL certifications, while several decorative strands in the listings are noted as not listed or not certified.