question: How does the halogen bulb decrease darkening over time ?
answer: by redepositing tungsten from the inside of the bulb back onto the filament
turker_answer: The halogen bulb decreases darkening over time by redepositing tungsten from the inside of the bulb back onto the filament .
rule-based: The halogen bulb decrease darkens over time by redepositing tungsten from the inside of the bulb back onto the filament .