The manual mode is still a bit beyond me but I do understand what you posted.
You can "cheat" to find the right settings.
Review the halogen/before photos in your camera. You may have to press the info button once or twice to see what settings were used. Make note of those settings, then use those settings to take new photos with the LEDs in.
If it works the way I think it will, the before photos you posted here should still look pretty good, whereas the LEDs should look bright to the point where the photo is overexposed and details such as trees may be whited out.
This assumes that you have the LEDs in and don't want to take new "before" photos.
If you are willing to do what is admittedly more work for you but should give more accurate results, do the steps in opposite order; take photos in auto or P mode with LEDs in until you find results that most closely represent what you see in real life. Then make note of those settings, swap the halogen bulbs in, and take new "before" shots using those new camera settings.
In this case we should see LEDs with "real life" brightness, then halogens which are much dimmer, represented by an underexposed photo.
No pressure, I know this is labor intensive. But if you feel like experimenting with your camera this would be a thoroughly educational exercise.
Photography is a great hobby and there is a LOT to learn. Way more than most people realize. I never really appreciated professional photography until I got my own DSLR and realized how much goes into a great photo.
The 70D is on the short list of cameras I want to get to replace the ancient Rebel XT that I still use... Don't laugh, I still enjoy it