I had some blue ones in my corsa c when I first started driving and I had them hard wired in with a switch. They look pretty neat as you couldn't see the bulb, just the glow.
Why don't you wire them up to your interior light then they should (technicaly) light up when the doors open.You can run the wires up the inside of the doors and along inside the roof lining straight to the interior light then you ave a nice subtle mod and no wires showing. Easy to wire up to as its only two wires to the interior light.
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