Hi everyone,
Welcome to the Hotwire forum, the place to fulfill all your incandescent, HID and other hot technology desires. This thread will be stickied to provide a place for us to share resources and information about this potent technology. Please feel free to post links, formulas, tables and data, etc. In the near future, I'll be adding bulb and battery compatibility tables, common power, rerating and output formulas and more.
This is my first moderating gig so advice and feedback will be graciously accepted.

Wilkey
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Begin Resources
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1. Welch Allyn Welch Allyn, commonly referred to by the acronym "WA" by flashaholics, is a large manufacturer of light engines and the devices they go into. Their business is quite diversified but encompasses medical and industrial markets among others. Flashaholics are most interested in their miniature halogen lamps and their Solarc HID systems.
The following documents can be found on the Welch Allyn
Applications Notes page.
Portable Lighting Applications: Miniature Halogen and Solarc LampsA very nice sales-type introduction to their halogen lamps and Solarc HID offerings. Of particular note is a complete table of their halogen lamps organized by operating voltage.
Miniature Incandescent Lamp OverviewA short sheet with information about the different types of incandescent lamp technology. If you ever wondered about the differences between xenon and krypton and fill lamps, look here.
Lamp Optical Characteristics of Miniature Halogen LampsA short sheet with information about light output and color temperature. Formulas for calculating lumens and efficacy are provided.
Electrical Characteristics of Miniature HalogenA short sheet that is important for the information it provides about re-rating bulbs. That is, how output and lamp life change as the bulb is underdriven or overdriven.
Mechanical Characteristics of Miniature Halogen LampsA short sheet with information on the mechanical aspects of their bulbs. You can learn about their bulb construction and lensed versus plain end bulbs.
Environmental and Operational Considerations of Halogen LampsA short sheet about physical stresses that bulbs might be subjected to and their effect.