Does anybody make a bike tail light that is bigger?
Everything I can find is just another dinky blinky.

I would like something that was 3-4" square.

I would recommend power over size. Check out the Dinotte LED taillights. I have their 140 model, which is like having a red headlight on the back of my bike, and their 300 model is even more powerful.

Whole thing lights up..

https://www.peterwhitecycles.com/taillights-bat.asp
"Busch&Müller 4DToplight series taillights have four LEDs, two in the center and one each on the sides of the reflector for increased visibility to the side."

I have the 4D Senso Plus, it runs off the hub-dynamo, senso means motion and darkness turn it on and off.
that is the battery powered.

The B&M Line Tech fresnel like prism system is good too, the internal reflections
make the LED point light have width .

On another Bike Also dynamo powered
a capacitor keeps the light on for a few minutes, at Stops.
and their new brake-tech lights brighter as the dynamo pulses become slower, with speed.

+1, larger format tail lights were more common when they were powered by 2 D-cells. But lighting has gotten so efficient that today's small format lights are visible at far greater distances than their larger predecessors. They're also lighter, and less likely to get broken off when bumped into.

If you want a bigger light profile, consider a pair of small lights, one on each seatstay, and one on the seat post, and one on a belt clip. Also blinking lights are far more attention getting, and aren't confused with the stead light of a car. That's important because you want an oncoming driver to know it's not something moving at close to his speed.

When I ride to work most of my co workers pass me.
They are not impressed with my Serfas seat stay light.
It is very bright but directional and so tiny that it is hard to recognize.
They can see an orange vest long before my light.
I am tempted to buy a trailer light and put a good headlight inside for a bulb.

These are what you want:

https://www.artscyclery.com/Cygolite_...rumb=RDMACCESS

or

https://store.dinottelighting.com/din...-mount-p5.aspx

Both can be seen from 1/4 to 1/2 mile in the daytime.

I use a CatEye TL-LD1100 taillight that takes AA batteries, has six LEDs on the back and two on either side (so it blinks on the side as well as back of the bike). I love it, though it isn't the strongest or most useful in the daytime, it works well for me in the winter months with overcast or during our perpetual dark months. It's also bright enough that when I move into an area the buildings and cars around me flash red in rhythm with it.

I think the main thing is to have a taillight that moves (like cop cars from side to side) rather than just blinks. It draws the attention of drivers more than a flashing light since flashing lights are more common on roadways (stop signs, etc.). I bought mine off Amazon, but it looks like the price has gone up since I purchased it.

It's not about size, or even power. It's about standing out in visual clutter. I bolster my lighting system with a lighted leg band or blinky tied behind my ankle. Pedaling has the light going up and down, mimicking the motion of someone waving a light at an accident scene.

Whatever you decide, do a contrast test. Park a car with lights on, then walk back about 30-50 yards and have someone hold your bike there. Now walk back 100yards and look at your bike and decide if it's visible enough. BTW- there's too much red out there, so I prefer to use amber lighting when I can find it.

I ride down the shoulder of a highway with moderate traffic.
Once the passing car's headlights hit me my reflectors work great.
I need to be noticed a half mile away and off to the side.
Car taillights are not all that bright, but they are very viable from far away.

As I said, do a contrast test. Bigger isn't always brighter, but if you want you can always buy an automotive lens or reflector, and improvise a mount in front of your bike taillight.

Think German.

I have a 4D Toplight, a 1/2w Cherrybomb, and a couple of PBSF clones. The 4D may not be as intense as the others that I have, but it is just as noticeable due to the broader surface area.

I ride with MULTIPLE taillights, spanning over 3 feet. I have a MagicShine on the rack (3 watts), a Knog Blinder 4V on the post (44 lumens, probably 2 watts) and a Cygolite on my helmet (another 2 watts).

I think having multiple blinkies spanning a wider area is better. With one light, there's always a chance that it'll happen to be right in line with some other lights from a driver's point of view; perhaps you'll happen to look just like the right hand taillight of someone in front of you. Maybe you're approaching a line of cars all turning and there are a bunch of flashing lights.

Same here!
I have 5 in total.
1 @ the top of my backpack, its about 8-9" wide, &:@ smaller 2W blinker near the bottom of my backpack. I also have a reflective strip velcroed around the middle of my pack.

I have a Serra Thunderbolt on my seat post, PLANET BIKE SUPERFLASH TURBO just below, & another 2W blinker.
I also have 2 of the same blinker on my bar end facing out so it illuminates my sides a bit.

Yes 7 red blinkers/flashers are overkill, but I ride before sunrise, & often just before sunset on the way home. I make myself as visible as I can.
I use 5 in the front.

I'd go for activity over size, e.g. blinking, moving up and down.

Before going with other colors, check your state laws. PA only allows red on the rear, amber on the sides, and white on the front.

I actually use 3 taillights as well. A Dinotte 140 on my bike, a Light & Motion Vis 360 on my helmet, and a Superflash or Radbot on my seatbag. In addition, I wear reflective bands on my ankles. More is better.

OP, I hear everything is bigger in Texas. Just drive south a bit and I'm sure they'll have some.

I just got a taillight from CatEye that is a good size, about 2 inches by 4 inches.

CatEye calls it a Reflex Auto. Reflex, in that the light is also a reflector (a rear reflector is required in my state, and probably in yours, too, but few cyclists I see meet this requirement).

Auto, in that a sensor turns on the light if the bike moves and it is dark outside (you can override this feature). CatEye also sells a version without the auto sensor.

This is one nice light. I've only had CatEye computers until now. The light has similar good design and build quality.

I like to ride with a solid rear light and a blinking rear light.

I use a blinkie on the rear of my helmet, and I had been using another blinkie, set on non-blink mode, as my solid light. But, dang, that light got pretty small when it wasn't firing off in wild blink fashion, so I got this CatEye. I used zip ties to mount it to my Brooks seat, but it comes with mounts for more conventional attachment.

I'd recommend you give it a look — https://www.cateye.com/en/products/detail/TL-LD570-R/

these all sound great - any videos with all lights going?

Wow, would love to see a pick of it all light up at night.

Next time my wife comments on me buying another light I can point her to this post and tell her I am not even winning the race for the most lights.

This is only for my winter commute, normally I'll only use 3-4 if I'm riding after dark in the warmer months.
We get a lot rain, 3/4 of the year, so more lights help when its wet too.

I have the Cateye Reflex like others have mentioned. It replaced the Planet Bike Rack Blinky 5 (now on another bike). And I also use other posters suggestions of having multiple lights (PB Superflash, & red beam flashlight) although they may not all be on at the same time.

18......

Two Dinottes 9 inches apart.



https://www.youtube.com/watch?v=6f38KP1qa8E

https://www.youtube.com/watch?v=ThwjZ6j11mc

Fixed.

Here's a video I shot with my phone.
I may do a better video with my DSLR when I get home.