Hyperikon 18-Watt 4 ft. Linear T8 Clear 5000K Single-End Powered Ballast Bypass LED Glass LED Tube Light Bulb (24-Pack) HyperBY-4C-50G - The Home Depot
OttLite 18 Watt Replacement Tube | Bulbs and Tubes
F15T8 LED Tube Light, 120 Volt 18'' 7 Watt Tube Light Bulb, 5500K Daylight White | eBay
The Mean 18: British-Style 18-Watt Amp Kits from Mojotone and Tube Depot - Premier Guitar
18 watt T5 Fluorescent Tube for SLL18 Fitting
LED-Tube-BFC 120 cm, 18 Watt, fungicide - Asmetec LED Technology