I’m very satisfied with the Rongpas 2 Pack Headlight Bulb. I recently used one as a replacement for the headlight on my John Deere E130 lawn tractor, and it worked perfectly. The specs matched exactly what I needed: 12 volt, 21 watt, with a single contact bayonet base. The installation was straightforward, and the bulb provides bright and reliable illumination. Having a spare bulb in the package is also a convenient bonus. Overall, I’m happy with this purchase and would recommend the Rongpas Headlight Bulb to others looking for a reliable replacement.