LEDs for stop lights

Hi guys, I recently ordered 7443/7440AL Reverse Backup Lights Xenon 6000K White 54-SMD 1206 Chip LED Bulb (Ebay item 311455397112) for my 2013 Corolla to install them as stop lights. I'd like to share my experience with you. Interesting thing is that if one or both LEDs are installed and brake pedal pressed - stop LEDs, front blinkers and dash board light up... Weird... Also, during evening time, I compared these LEDs with genuine Sylvania light bulb and Sylvania seems to be brighter than this LED. Do you think that brake LEDs require additional resistors?