It might be foggy if...

[lemmiwinks]

Your glasses fog over three times in less than 5km! I gave up in the end and took them off.

Also, you might be an idiot if you get almost to work, check behind (no traffic visible) then move over for a right hand turn and decide to double check your blinky is flashing bright and strong, only to discover that it's illuminating your rear brake because you neglected to properly tighten a screw At least no one drove over me from behind

[hartleymartin]

More often I find that the mounting supplied with many cheap lights are absolute rubbish. I use cable ties to attach them to the bicycle instead. 10 cents worth of cable ties more effective than the mounting I just paid $20 for. Says a-lot about budget gear.