Austin, the ones I have are much brighter than they used to be in days gone. Use in direct sunlight is no problem. They are certainly not intended for driving with
hence my admission and embarrassed emoji. The fact that I did 90 miles tells me they are certainly well made ones. I can provide details to the OP of where mine came from if required.
I should have mentioned the timing light, this is the way to do it properly of course but I suspect the OP may not have one and was therefore keeping it simple. I guessed mine on assembly recently and tested with light afterwards and was spot on.
I use one with a pot for advance/retard. But it's possible to static time as well with a very simple home made test kit.
Here is a link to an example, it's the first one that came up on google but serves to illustrate the "point" well.