Stick with the white ones guys!
The blue ones could be considered to be "A device resembling a Special Warning Lamp" (the blue lamps fitted to the front / rear of emergency vehicles) and the nasty Traffic Copper might give you a ticket or an appointment to see the local Magistrate!
And before anyone starts going on about the blue washer jet LEDs that the Chavs put on their windscreen washer jets (generally referred to a "Wank*r Lights" 'cos they tell everyone you're a Wank*r), they are too small to be considered a special warning lamp.
Also, this "PodMod" gizmo that causes the lights to "Glint" is a no-no for highway use in the UK. "All lamps to show a steady light". So sayeth the Road Vehicle(Lighting) Regulations (obvious exemption for indicators!).
Just coz it "modulates" really fast, doesn't mean it's not a flashing light!
Really gets my goat when people flog stuff without pointing out that it's not legal for highway use. I consider it akin to someone trying to stich me up!
Stay safe.
UPDATE: Just watched the video of the Blue Bullets with the PodMod in operation. DEFINITELY a device resembling a special warning lamp and illegal for highway use in the UK!
You are wrong about small blue lights. You must also have a white sidelight with it, it is not a replacement for the side light. The bullet pod lights are WHITE not blue. The blue ones are T10 501 bulbs.
I have blue ones on my bike and have had this reply from the Yorkshire Police
QUOTE
Rick
On reflection you may have meant lights on the side rather than side
lights. You can decorate your bike with lights on the side in blue as long
as there are not so many that they would dazzle or distract others, so
stick to a few low power lights. They mustn't flash or move around in any
way.
The other important point is that it must not be possible to see them from
the rear, so position them so that a wide (ish) vehicle, that can see down
the sides of your bike wouldn't be able to see them from the back, perhaps
get ones inset into something so they literally only shine sideways.
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I hope that clears up any problems. I carry the above printed out with me in case I do get stopped, I have had them fitted for over 6 months and never been stopped, and have followed police traffic cars.