The front light puts out 500 lumens and features a 2500 mAh rechargeable lithium battery that doubles as a backup power source for your smartphone. It's rain-resistant and the lamp should last 8 hours on the low setting, 4 on medium and 2 hours on high. They also claim 120 hours if you put the light in flash mode.
It's water-resistant and easy to install. 500 lumens is on the bright side of the rechargeable battery-powered bike lights out there and Satechi offers a 1-year warranty.
The rear light is also easily installed and claims 3 hours at high intensity or 6 hours for low or flash settings. It's easily installed and removed so you can carry it in your bag until you need it.
Both devices are available via Amazon if you're a Prime customer. If you're not, Satechi offered a free iPhone 5 case which counteracted the UPS shipping charges from their site.
Both of these are solid and lightweight. They're worth a look if you're riding at dusk or later.