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LED Festoon in Cup Interior Light



  Racing Blue 182 Cup
Got a Phillips 4000k festoon LED for interior light but it lights up dim when light is off normally, when you lock the door its fine. Any reason for this, and can it be fixed?
 
Mine does the same, though not the same brand bulb etc. I had two ideas about it:

1) When the car is unlocked the circuit is closed (allowing current to flow through it) as it's highly likely you're about to open the door and either use the car or need the light on. Then when you lock the car, the circuit is closed (so no current can flow through it) for safety purposes as it won't get used anyway.

2) There's a residual/low level current flowing around the circuit and the SMD/LEDs are more sensitive than a traditional filament bulb and thus light up, albeit it very dimly.

No idea if either is true or not, just the only things I could think of. My money's on #2 if either are right though :tongueout:

Edit: Bothered to do some Googling. Looks like I was mostly right with theory #2. There's probably a low amount of current flowing through the system, possibly supplying or involving a switch or sensor. Could still be wrong, but there's a lot of articles about it with LED bulbs in house lights etc.
 
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McGherkin

Macca fan boiiiii
ClioSport Club Member
Not too bothered about it as it's not going to drain the battery, is it?

Nope. Never has on either of my clios, and I've had big juicy SMDs in there.

And the answer is No.2, can't remember why it has a constant current flowing but it's something to do with the dimming circuit IIRC.

(BTW, the light is a straight swap for the map light unit - I've managed to fit a big SMD panel in there which is feckin' bright on the interior light side, and a decent CREE w5w in the map light - lovely job)
 
(BTW, the light is a straight swap for the map light unit - I've managed to fit a big SMD panel in there which is feckin' bright on the interior light side, and a decent CREE w5w in the map light - lovely job)

I saw those panels the other day - too bright or good? Was considering fitting one. Also, were the map light units not standard?
 

McGherkin

Macca fan boiiiii
ClioSport Club Member
Is there a too bright? IMO it's very good. I'll stick a guide up at some point.

Cup models didn't come with map lights because lightweight y0.
 

McGherkin

Macca fan boiiiii
ClioSport Club Member
No soldering required, just getting the right size panel (very close fit), and pulling the unit apart just enough to get it in.
The panels I bought came with w5w connectors too.
 


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