Once in a long while, I do have to ride in the dark. That in itself isn't a problem, especially now that it's staying lighter, later. My biggest issue is when I do need to ride after dark, is signalling. I do have turn signals on my bike, but one socket has cracked, rendering it useless. It's also a Canadian tire product, so quality isn't exactly there... I would like to replace the signals with something that's better quality and preferably, LED. Any ideas/recommendations?

I've considered putting automotive lights (LEDs perhaps)on the four corners of my bike and running it through an automotive flasher unit, with a switch and battery.

sounds like you've already got the switch and flasher. I don't see why you couldn't replace your broken light with a new one.

I suppose the reason I haven't gotten around to it yet is that I haven't felt all that much need for it. Hand signals get me through most everything.

But if you ride in heavier traffic than I do, then it might be worth your while.

I put some big patches of bright yellow reflective material (from a safety sash) on the backs of my gloves so my hand signals will be more visible. I think it's more effective than any turn signals that I'd attach to the bike given the narrow width available and that bicycle turn signals are rare and therefore not expected by most motorists.

The issue I see is the lights aren't spread apart enough to really convey the direction you're turning. I'd really have to go with something that flashes an arrow but those that I've priced anyway are too pricey to be attractive. The alternative could be a single yellow flasher that would indicate that you're turning, but not the direction. That might actually be enough when you think about it.

I think using hand signals with reflective bands on your wrist would be much more effective or even lighted signal bands might work.

https://www.gloglov.com/

https://bicygnals.com/indicators.php

One of the light modes has the middle light normally blink, then turn solid when a turn is indicated. I have a partial review on my blog(https://akbearcub.com/blog/?p=21), but unforutnately, my apt is a massive mess and I can't complete the review until I find the rest of the unit(I can only find the rear blinker atm). That said, it show promise, imo.

Lack of brightness, lack of L/R separation and lack of quality are major problems with all turn signals I have seen that are marketed for use on bicycles.

All is not lost.

If you go to a 12V supply this opens up all the scooter, motorcycle and automotive stuff for this application. It does mean putting together your own system, however. I ended up with this on the e-trike. Why stop at turn signals? Add 12V running lights, a brake light and a horn too. https://www.youtube.com/watch?v=6odr9Ex8_GY