Question

How did the old lights and new lights differ?

Answer 1

The terms Old Lights and New Lights (among others) are used in Christian circles to distinguish between two groups who were initially the same, but have come to a disagreement. These terms have been applied in a wide variety of ways, and the meaning must be determined from context. Typically, if a denomination is changing, and some refuse to change, and the denomination splits, those who did not change are referred to as the "Old Lights", and the ones who changed are referred to as the "New Lights".

Answer 2

The old lights were old and crappy, the new were new and great! :)

Answer 3

@humecky the old lights were bad for the environment and cost too much money on electricity bills, the new are green and stuff ;)