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After my last front light was stolen, I bought myself a cheapie from eBay. The bracket was terribly fiddly, and after I had finally managed to get it to stay where I wanted it, the light itself broke.
Not wanting to spend another three hours installing a bracket I decided to do a bit of research and get something decent. I came across a review for the Knog Boomer, which sounded perfect. No bracket! This is absolutely my favourite thing about this light. No bracket to install, you just wrap the silicone strap around your handlebars (or wherever you want, within reason) and attach it to the hook at the back of the light. It's on! And when you remove the light, no unsightly bracket is left behind to spoil the clean lines of your bike. It's a bit fiddly at first, but you get the hang of it really quickly.
It's blindingly bright, too. It's just one LED so I wasn't expecting anything amazing, but as we all know it's quality not quantity, and this LED is super bright. According to Knog it's up to 55 lumens (which apparently is 1/8th as bright as a 40w bulb). There are four light settings, three flashing and one steady. Two of the flashing settings are erratic, containing longer bursts of light and shorter bursts, which in theory attracts the attention of drivers more than a regular flash would. I'm not sure what the difference between the two erratic flash settings are, I just use the one that comes on first when you press the 'on/off' switch. Another thing I like about the Knog Boomer is that instead of having to cycle through all of the settings to turn the light off, you simply hold down the 'on/off' button and it turns off.
So that's the Knog Boomer, but the Knog Boomer Rechargeable is even better. Instead of having to buy batteries, you recharge the light using a USB port. No cables required, the light itself has a USB shaped plug that just plugs straight in. Not needing a cable means that you can charge your light anywhere where there's a computer. I plan to charge mine at work, not that it needs charging often. Knog suggests that the burn time is up to 3.5 hours on steady or 12 hours on flashing mode, but in my experience it lasts much longer. I've charged it once in one month's use (that's with half an hour's use every day), and it's still going strong. The only thing I would say about charging the light is that it's wider than something like a memory stick, so will take up a lot of space. If you have two USB ports, while the light is charging you won't be able to fit anything in the one next to it. Still, it does charge quickly. You know when it's done because the indicator (which is the light itself) changes from red to green.
The availability of so many different colours is really the icing on the cake. I chose pink to match the flowers on my handlebars, but you can go as crazy or as tame as you like. The only colour they don't have that I would like to see is yellow.