Taillights under $30

Stay clean and stay seen with Topeak's DeFender iGlow X. They're a unique pair of fenders with integrated 0.5W super bright red LEDs for safety at night or during low visibility conditions. The lightweight polycarbonate is tough and flexible, and the stainless steel strut attachment system is easy to install and provides adjustability for excellent tire coverage. Plus, you'll get up to 100 hours of run time on each fender's 2 coin batteries (included).

The Plus rear bike light is a super-bright, 100% waterproof and versatile USB rechargeable bicycle light. Mount the light to your seatpost, seat stays, and pannier racks, or use the integrated wearable clip to attach the light to your t-shirt or backpack. More of a runner than a cyclist? No worries. The Plus light also doubles up as a wearable night running light. Just attach the light to your t-shirt, shorts, socks, or headband using the smart integrated clip. With an output of 20 lumens and a run time of up to 40 hours in eco flash, the Plus ensures you are well seen to all other cyclists, road users, and trail runners all night long.

Charge, Click, Go! Hassle-Free Safety Light Just press the lens and, click, traffic can see you! A silicone mount lets you attach this powerful little light almost anywhere, and the handy LED fuel gauge tells you when it’s time to recharge with its micro-USB cable. No more batteries — just charge, click and go! - Charging Cable Included, No Tools Required - Lithium Polymer Battery - Waterproof To Ip-65 Standard - 3-Hour Recharge Time

SEEMEE 20 is a lightweight Micro-USB rechargeable tail light. Its high powered COB red LED light source producing a max output of 20 lumens, and is capable of 180° of visibility.