A while back I took a short video of our flame lights. They're similar to the ones J W Halloween suggested. Two things to pay attention to when buying them. Make sure you buy the type that are gravity sensitive if you're going to put it into a light facing downward. It really does have a strange look to it if the lights don't shift their orientation when you change which way the bulb is put in. The bulb you're looking at in the video was a nine watt. It's about the equivalent of a 40 watt incandescent.
Also look closely at the design and layout of the LEDs as they can make the effect look great or not depending on who is manufacturing them. We purchased a set from one vendor and they're not so much flames as strobes. We put them on the "breathing mode" and they're usable that way, but not as flames. We got some that we like at https://www.aliexpress.com/item/99-...826.html?spm=a2g0s.90423188.8.131.52424c4dipG6MD
for our blue colored version. We purchased the green flamed version at https://www.aliexpress.com/item/E27...000&pvid=3f52dd66-52f5-4944-adf9-ee4f0f059565
. They all seem to work well for what we use them for. We used a different vendor for our regular yellow flame lights. https://www.aliexpress.com/item/Cre...692.html?spm=a2g0s.90423184.108.40.206424c4dtkc6gM
. Just be careful when you order to get the right base size. We bought one bulb thinking it was going to be a candelabra light and it turned out to fit only UK sockets. But really, just bounce around looking at what's being sold. The prices are constantly in flux between vendors at Ali Express, and you can walk away with some real deals.
Another option a bit more like what the Joker has, but without quite the investment, is a Gemmy Short Circuit Rusty Attic Bulb. They're on sale right now at https://www.partybell.com/p-42793-r...Lffh-dhy5uEIM3KsaNL9uyNXscYLgGf4aAvg9EALw_wcB
for $10.99. Other places sell them for similar prices and shipping rates vary. We got ours at Home Depot on sale and they work pretty nicely. The only down side is they turn off for about five seconds at the end of their cycle. We solved the problem by having other ambient light to cover the down time so that the room doesn't go completely dark. Also as they're on a separate cord, we turn one on and then the other about ten seconds later. That way their down times don't sync. They all pretty much do what the video below shows. The Joker's lights are far better, but a couple of these make our witches shack look pretty beat up.
Hope that helps.