That sounds impressive until you read the fine print: "compared with worn standard halogen" bulbs. Still, such claims are making premium-priced halogen bulbs an alluring choice for drivers.

This grow light is equipped with both white and red ... yet provides the light equivalent of a 50-watt halogen bulb. You can choose from five brightness levels according to your plants’ needs.

In halogen lamps, the quartz envelope is closer to the filament than the glass used in conventional light bulbs. Heating the filament to a high temperature causes the tungsten atoms to evaporate and ...