Published May 12, 2026, 5:00 PM EDT Jonathon Jachura is a mechanical engineer with over 12 years of HVAC industry experience who specializes in translating complex home systems into practical advice for everyday homeowners. His background spans technical sales and product management for major manufacturers, combined with hands-on experience as a two-time homeowner who has tackled everything from system installations to troubleshooting repairs. Jon focuses on helping readers make confident decisions about their homes through clear, actionable guidance that saves both time and money. Working under a sink with a flashlight clenched between your teeth is a rite of passage nobody asks for. The fix is a cordless work light that hangs, sticks to metal, or props itself up while you work. Most run on the same batteries as your existing tools, so there's no separate charger to deal with.…