ABOUT THIS ITEM: The 3535 series is an extremely efficient SMD LED provides a very good color, the brightest LED chip on the market. Long-lasting, low energy doesn't zap you power supply, faster on/off response time, unique, vivid color, simple to fit. 10 times brighter than 5050 SMD LED!! Each time the brakes are applied, your brake light will flash 4 fast flashes followed by 4 slow flashes FEATURES: -Package Content: 2 LED high power light bulbs -Color: Red -Compatible with: 3157 INSTALLATION: Professional installation is highly recommended (No instruction included) 3157 Strobe LED Brake Light Bulbs 3157 Strobe LED Brake Light Bulbs 3157 Error Free Switchback Light Bulbs Add to Cart Add to Cart Buying Options Customer Reviews 4.0 out of 5 stars 31 4.0 out of 5 stars 69 4.0 out of 5 stars 13 Price $15.99$15.99 $19.99$19.99 — no data Color Red Red Switchback Flash rate 4 fast flashes followed by 4 slow flashes 4 fast flashes followed by 4 slow flashes no data Non-polarity design ✓ ✓ ✓