Not sure if there was already a thread started on this. I had some trouble finding a definite answer/thread to this myself so I was thinking this would be helpful to some, if it's already up, mods just delete this post! But the bulb size for the reverse lights is
194 T10 I've been informed that 921 T15 bulbs will also fit/brighter

These are what I got today, from ijdmtoy.com
http://store.ijdmtoy.com/30W-CREE-16...s-p/10-352.htm

If anyone wants I could do some night shots later on.

 

Looks nice. Very clean. I think I'm doing this too.

Was it hard?

 

It took me maybe 2 minutes..? You just got to take off 3 plastic pins on each side to get to the bulb, not hard at all

 

Would you say this significantly helps with visibility on your backup camera at night?

 

Of course LED bulbs significantly helps with visibility more than those halogen bulbs. Especially at night, people can actually see you backing up verse the halogens.

https://www.google.com/search?q=led+...HstPXQk-diM%3A

Here's a reference^

 

Hope this will help your install.

 

If you could take some night shots that'd be great! I'm really interested in getting these but also don't want to be blinding people when i reverse.

 

Will post up later on tonight when I get the chance

 

That is exactly how it's done haha

 

 

Damn those look wayy brighter than your taillights. I think I'll get em and try them to see if they're too bright for me haha. Thanks!

 

They're bright, but it's not as blinding as it looks like at some angles in he picture. But they're definitely brighter!

 

nice LEDs, I have white ones too.

cool plate btw.... lol

 

921 are the exterior (generally brighter) light equivalents of the interior 194. just fyi

 

That's correct. 921 T16 is the default for reverse light for IS and probably all other Lexus including the RX.

Not surprised T10 works fine for the OP as the connector is the same as T16. However, it is a surprise to see it still looks bright enough.

I have LED T16 for reverse light in my 3IS. When choosing LED for reverse light, I find due to the narrow "window" of the reverse light enclosure in 3IS, it is more ideal to use a LED light bulb which has as many SMDs in the front facing direction as possible. I had another T16 PIAA reverse LED light that I used in my previous 2IS and found it not as bright when in 3IS. So I bought another one with a different design and it works much better.

FYI, the highest lumens a reverse LED light (T16, T20, S25) could emit that I come across is 500lm which is a claim from IPF. Typically a reverse LED light (T16, T20, S25) nowadays has 150lm - 300 lm.

Again, high lumens doesn't necessarily guarantee good result due to the location of the SMDs on the light bulb. It really depends on the enclosure of the reverse light for a particular vehicle.