So, now that I have a rack and bag on the back of the new bike, my old one didnt have that. I'm kinda wondering were to put my rear tail light. Just curious were you put your rear tail lights, my light is made for a seat post and is pointless now with the bag on the back. Tips and pictures please!

Thanks,
Adam

^ that is just a reflector on the bag rack. thought about taking it off and putting my light there but it is glued on.

(Edit) Sorry it has a screw in it,its not glued on. I just wonder how I can mount my light being its made to go around something round. Hate to buy new lights.

Get rid of the reflector. That's where the light should go.

I cut a piece off of a broom handle to attach a CatEye light mount to my rack (Blackburn MTN).

That works, or 1" pvc.

I bored two holes in the belt clip of my blinky and threaded a zip tie through it and the holes in the reflector mount. Ubersecure mounting, my blinky thanked me.

Put it in place of the reflector. Also, you can mount a second light on the left angled part of the frame (going from the rear axle to the seatpost). Another good spot is on the bags/panniers.

I bought a Cat Eye oval blinkie that screws on a regular vertical 2 hole reflector bracket.

Some racks come also with a 50mm spread horizontal hole pattern,
European lights fit those: B&M, Spanninga, AXA-Basta.. etc.

I had a similar issue when I mounted my trunk. It blocked the reflector completely and partially blocked the blinkie that was on the seat post. I do have a light mounted to the rack itself, but I always like more.

Here's the cheap, DIY method for relocating that seat post light. You'll need some electrical tape and an old inner tube. Take a small section of tape and start it around the lower rear strut on your rack. Then connect it to one end of the tube. Wrap the tube around tightly until you've got enough for the mount to clamp securely to. Then go around the tube a couple of times with more tape. I did that myself (after getting help here) and my light was more secure than I thought it would be.

Planet Bike makes mounting hardware to put blinkies on rear racks. It's what I use, since my saddle bag is where the light would be.

Back of the rear rack -- PDW Radbot comes with rack, stay, and seatpost mounts, I always use rack because it's behind any possible obstructions.

Used to be mounted under my seat, but now it is located on seat post.

This is what I did. Works okay and light seems to stay put, if it falls off guess ill upgrade to something that suits the rack better. Just a cheap set of led lights but as long as they work then they work..

Here's my Planet Bike blinky mounted on my rack. As you can see, no place for putting it on the seatpost. I tried clipping it to the strap on the saddle bag, but it kept bouncing off on the rough roads we have here.

Mine is on my left chainstay.
It is a PB superflash. Mounted here it leaves my seatpost free to use as a handle to carry the bike or service on a bike stand. Also, it can only be removed by using a screwdriver through the spokes from the rightside as the quick release is upside down. Makes stealing it more difficult.

Here's my B&M light, powered by the front generator hub. I've got an assortment of lights sitting around in boxes.

Almost all light builders include simple mounting hardware for mounting their lights in various ways? Contact the light manufacturer or just go buy a new light. REI has Planet Bike lights on sale right now and their blinkys are famous for being a great deal.

Almost all light builders include simple mounting hardware for mounting their lights in various ways? Contact the light manufacturer or just go buy a new light. REI has Planet Bike lights on sale right now and their blinkys are famous for being a great deal.

Here's Planet Bike's rack mount for their rear blinkies (different from what Igo is using):
https://ecom1.planetbike.com/3108.html

More of their parts:
https://ecom1.planetbike.com/smallparts.html

In the United States (and probably many other locales), that would render the bike non-streetlegal for night use in most states. I'd hate to lose my case in court against the person who hit me with their car, just because I lacked my basic requirements.

As a practical solution, I'd go with the broom handle/PVC pipe setup to attach the taillight, but then stick a nice big hunk of DOT Class II red reflective tape onto a piece of plastic, and zip-tie that to the rear of the trunk bag as the legally-required red rear reflector. 3M Diamond Grade is top-of-the-line (Ebay has it), but the Peterson Manufacturing tape at the Fred Meyer auto department is quite good too. You're looking for this:

Use a rear light that functions as a reflector, and you're all set.

I have a B&M toplight mounted to the rear of my rack, which takes care of the reflector issue. I also mounted a Superflash to the plate using an angle bracket.

Some jurisdictions require both a rear reflector and light.

To the OP, does the reflective strip on the rear of your rack trunk have an unsewn section in the middle of it for sliding a light onto it? Besides mounting on the rear of the rack in place of the reflector, which is a good idea, I have put a cateye light that has the clip on it on an ankle/pant strap on my left ankle with the light facing backwards, so when I pedal it is moving up and down. They used to make bike lights of this sort that went on the ankle. The movement catches the attention of drivers.

I can name a few, like the Planet Bike BRT-5, the Cateye TL-LD560 and 570, the feeble Cateye TL-LD500 and the one marketed by Serfas and Zefal. But none of them has what I'd call "slice-through-the-visual-clutter" levels of power as a light, and good reflective tape has better performance as a reflector, so if it were me, I'd go with the light on a fixed mount so it stays aimed precisely, then use the reflective tape as the reflector.

DC requires only a reflector in the rear, but also a white light in front. Funny enough, most cyclists here who use just one light are using a taillight and nothing in front.