The Eternaleds HP-3 Flood uses 3W to put out as much light as 25W incandescent floodlights while lasting 18x longer. It is a drop-in replacement that can instantly replace any GU10 bi-pin base halogen bulb since it was purposely built at EXACTLY the same size.
The HP-3 is a great replacement where high heat halogen bulbs are used typically in recessed or track lighting fixtures. It uses precision manufactured lenses to focus 3 high power LED's at a 60 degree beam while protected by an almost unbreakable aluminum housing.
Notice how the 20W Halogen is brighter than the HP-3. Halogen bulbs are more energy efficient than the same wattage incandescent bulbs. For this application, the lowered brightness is not an issue.
Here is a picture showcasing the kind of effect you can get with 3 x HP-3 Flood Daylight White bulbs. Notice how you get a clean, soft spotlight that highlights each painting well.