From Miracle Products Vintage Screwge Bulb & Power Savers
Two things cause bulbs to burn out:
a. Initial surge ( when you turn it on)
b. Overheating of the filament.
Screwge Eliminates Both.
Easy to Install and conserves energy by reducing up to 35% the voltage delivered to the bulb.
Which in turn extends the bulb life up to 90 times.
New Old Stock
Still in Original Packaging