Welcome KLD - you've posted in the right place. We love lighthouses as well as collect them.
The "Anatomy Of A Lighthouse" book is a good source. But you asked specifically about a Front Range light.
In some cases, two lighthouses were used, one was farther back and higher (above the water level) and the other is closer to the water line and lower (above the water level.)
The two lights were positioned in such a way that from the water, when you lined the lights one above the other, you were lined up to make a safe passage into port. If you saw the upper light to the left of the lower light, you needed to steer to starboard to align them.
Both lights were generally operated and maintained by the same lighthousekeeper in the old days.
An example in Georgia are the Sapelo Island lights.
Here\'s a good description of how the Doubling Point Range Lights in Maine are used to navigate the Kennebec River. (P.S. Watch our for the Fog Signal!)