Thank you for your help. Unfortunately I’m still having issues making it work 
First, here is what did work:
I managed to connect the point light component object reference and the light intensity float. It seems the problem was simply that I had placed the get-variable and the point light into the event graph separately and then tried to connect them. That gave me the “directions are not compatible” message I talked about.
The issue now:
I’ve managed to follow and include all the steps/nodes from your solution/code now, but somehow nothing happens to the light intensity when I scroll the wheel. Here’s my replication of your solution:
I also tried changing the link to the value pin on the clamp float, so it comes from the minus-direction and not the plus-direction (see difference in picture below). My reasoning was that the starting value of bonfire’s light intensity in my case is already the maximum of what I want it to have. The bonfire is already lit, it’s not like the flashlight which gets turned on from being completely dark/off. So to get any change when starting to scroll the mouse wheel, I would have to reduce the light intensity, not increase it. But it didn’t make any difference:
I also tried the original solution you provided earlier in the thread, but it didn’t work either:
I’ve also tried “clicking and holding down” the mouse wheel while scrolling with it, and I’ve tried adding the mouse wheel as an input action, tried deleting the “±direction”, tried using “mouse wheel up” event and “mouse wheel down” event instead of “mouse wheel axis”, but to no avail.
In all cases, when I scroll my mouse wheel, nothing happens. The bonfire looks the same as it always has. Do you know any reason why it might not work in my case? If there’s any additional information you need to assist me, then feel to ask. I’m very thankful for the help! 