Lumicycle's LED3Si is an excellent light that's impressive value for money. It's very similar to Lumicycle's flagship LED4Si road light but with just three emitters instead of four. Entirely unsurprisingly, that makes the claimed output three-quarters that of the 4Si at 850 lumens. Also unsurprising is that the battery lasts longer, with three hours on the highest-power mode.
The LED4Si is Lumicycle's flagship road light. It's not as powerful as Lumicycle's MTB-oriented XPG systems – a claimed 1120 lumens against 1500 for the XPG – but the 4Si is designed for the road and has a tighter beam, so it can get away with less total output and get better battery life. And 1120 lumens is still a lot...
According to the scores on the doors, this unit from Westbourne light wizards Lumicycle kicks out a mighty 1120 lumens. That's all good, but where this light really scores is in the little details that make it a joy to use.