Lights

No low setting on this light, just standard. 20 lumens. :)

The Moon Shield is an awesome rear light and at £35 it's very reasonable. Small, USB rechargeable, well built, super waterproof, built-in bag clip, fantastic power if necessary and has a well designed, strong, easily removable and detachable rubber strap.

It has 5 modes, a standard 20 lumen steady mode, high 40 lumen steady mode, "overdrive" 60 lumen steady mode and two high-power strobe modes. A steady 20 lumens is perfectly fine for riding at night with others.

Like Apollo said though, it has great side/top/bottom visibility, that accompanied with the fact you can angle it in any vertical direction is great – even the high-power/strobe is perfectly fine for night time riding with others if you angle it downwards (which also has the benefit of nicely illuminating the patch of road directly behind you).