Cadillac CTS-V 2004-2007 (Gen I) The Caddy with an Attitude...

V1 LED tails advice

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Old Apr 27, 2013 | 08:06 PM
  #21  
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I wish they made some LED tails with smaller and more lights along the side similar the STS, etc. More of the 'Cadillac' look I guess.
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Old Apr 28, 2013 | 03:15 PM
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Originally Posted by FuzzyLog1c
I would get the version without the projection lens. This will also make them suitable for use in your front turn signals.
What's your reasoning behind this?
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Old Apr 28, 2013 | 05:00 PM
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Originally Posted by GXP25
What's your reasoning behind this?
Because the projection lens gives you a hot spot in the middle of the reflector. The projection lens focuses the light from the forward-facing Q5 SMD LED down to about 30 degrees from about 75 degrees.
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Old Apr 28, 2013 | 08:24 PM
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Originally Posted by FuzzyLog1c
Because the projection lens gives you a hot spot in the middle of the reflector. The projection lens focuses the light from the forward-facing Q5 SMD LED down to about 30 degrees from about 75 degrees.
I guess that's the wider beam is desirable for turn signals.

I have a bunch of those LEDs on the way for testing. I hear good things about the CREE Q5 LED.

I'm definitely in a trial and error phase at the moment. I'm also contemplating the Samsung 2323.
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Old May 25, 2013 | 11:13 AM
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Those 25W CREE LEDs came in this past week. I bought the 3157, no lens, "canbus error free" ones (one amber pair and one white pair) just in case I ever wanted to keep these if and when I move on to a different vehicle. I ordered and paid for them on the 3rd yet they were shipped on the 11th and arrived on the 22nd. Ugh.

With that aside, they are the brightest automotive LEDs I've ever bought/used and I highly recommend them to anyone seriously looking at a filament replacement for turn signal bulbs and reverse lamps.

They're significantly brighter than all of the following. The first pair (1 5W CREE + 12 SMD LEDs) being brighter than the second pair (Samsung 12 LEDs):

"3157/3156 HIGH POWER CREE SMD AMBER TURN SIGNAL BRAKE TAIL STOP LED LIGHT BULBS/HIGH POWER CREE 7443 6000K XENON WHITE LED BRAKE TAIL/STOP LIGHT BULBS/BULB:" The white ones did not fit my reverse lights sockets very well; they were too loose and fell out way too easily. The amber ones were fine but left a hot spot on the turn signal housing. This was due to the lens that is affixed to the top of the LED.



"3157/3156 HIGH POWER SAMSUNG LED AMBER/WHITE TURN SIGNAL BRAKE TAIL STOP LIGHT BULBS:" These were brighter than my previous LEDs which were similar to their comparison pictures below.



EDIT: The 25W CREEs that I bought: http://cgi.ebay.com/300780205297/

Again, I opted for no lens.

Last edited by GXP25; May 30, 2013 at 10:40 PM. Reason: Added some more info.
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Old May 25, 2013 | 11:34 AM
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None of those are 25W housings with 5 Cree Q5s. I wouldn't recommend any of them.
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Old May 25, 2013 | 01:33 PM
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Originally Posted by FuzzyLog1c
None of those are 25W housings with 5 Cree Q5s. I wouldn't recommend any of them.
Clearly.

I'm simply stating what I've been through and how the 25W CREE LEDs that came in were far superior to what I have tested (those in the pictures).
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Old May 25, 2013 | 01:40 PM
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Originally Posted by GXP25
Clearly.

I'm simply stating what I've been through and how the 25W CREE LEDs that came in were far superior to what I have tested (those in the pictures).
Ah, I misunderstood. I apologize.
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Old May 30, 2013 | 10:35 PM
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That's fine. Maybe I wasn't clear enough.

But yeah, these 25 W CREEs are definitely bright and worth the money.
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