system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Could someone wear more than one type of Lantern ring?

For example, red and yellow, or green and white, or maybe all of them. Has this happened before? Who has done it? What are the effects?
gpt
Yes, it can be done, but it's generally a bad idea. The rings require large ammounts of specific emotions. (or willpower. It annoys me so much that "Willpower" is classified as an emotion for some reason.) and they also amplify those emotions. Trying to sustain two different emotions at high enough intensity to use the rings is extremely dangerous for your mental stability. Hal Jordan wielded two different colored rings briefly, and it almost tore him apart, and that was Green and Blue, willpower and hope, which are very complimentary emotions. 

White doesn't really count, the black and white rings don't work quite like the others.