I want to know the answer to the following question:
What company first marketed light bulbs using the reflective capsule technique to increase energy efficiency?
All the background I'm provided with is that "This concept was pioneered by Duro-Test in 1980 with a commercial product that produced 29.8 lm/W. More advanced reflectors based on interference filters or photonic crystals can theoretically result in higher efficiency, up to a limit of about 270 lm/W (40% of the maximum efficacy possible).". Is that enough to answer the question?
Answer: yes