Greenlight and Gaslight - What's Going on With Them?

Greenlight doesn't come from the verb to light, meaning to illuminate with green light. It too is formed from a noun phrase, the green light. So using the same logic, if it's a verbed noun, it is regular. And so by that logic, the pastense is, i green light at the project. And the past participle, i have green lighted the project, or the project has been green lighted. But according to some poles and searches i've done, they're basically about half and half. That's an irregularity creeping in the language. Because gaslight and greenlight really should be regular verbs,. Their pastences should be, in my