Thanks to Dan Wright, and his epiphany to experiment with a Pyrex custard dish, we have the modern sealed beam headlight,

Many lamp products are developed by teams of people and several persons may be recognized as the principal developers or inventors. On the other hand there are products that have been marketed that are rightly associated with only a single person. The success of three lamp designs can be attributed mainly to one man, Daniel K. Wright. The three lamps are: a high wattage lamp in which tungsten powder is present to allow bulb blackening to be eliminated by way of mechanical scrubbing, the high wattage incandescent lamps in the 10,000 to 50,000 watt range, and the sealed beam lamp developed for use in automobile headlights.

Dan Wright was born September 25, 1883 in Paterson, New Jersey. He joined the Engineering Department of the Edison Lamp Works at Harrison, New Jersey in the year 1909; in 1922 he was put in charge of mechanical developments. He started to work in the Lamp Development Laboratory at Nela Park in 19271. Daniel Wright was the person behind two of the largest lamps ever produced. The practical incandescent lamp had its beginning with Thomas Edison in the year 1879. As part of the 50th anniversary of this event Wright helped produce a 50,000 watt lamp2.

"To bring the 450-ampere leads inside the bulb, he modified the Housekeeper copper-to-glass seal which had been used in X-ray and other vacuum tubes...Through Wright's contribution and the development of iron-nickel-cobalt alloys in Germany and here, high-current and high-wattage lamps became practicable. Heavy leads were brazed to metal ferrules which, in turn, were sealed to the glass.This construction also withstood appreciably higher temperatures than previous designs and, with the development of Pyrex-type of glass bulbs, led to the design of compact bipost lamps of high wattage-to-size ratios."

http://www.lamptech.co.uk/Documents/People%20-%20Wright%20DK.htm

https://patents.google.com/?inventor=Daniel+K+Wright