There were long-lasting bulbs on the shelf, but they were niche products because they produced poor quality light and were inefficient. Here's an example: https

There were long-lasting bulbs on the shelf, but they were niche products because they produced poor quality light and were inefficient. Here's an example: https://www.youtube.com/watch?v=JQpqyt3oeqk https://www.youtube.com/watch?v=JQpqyt3oeqk . Note that it consumes 40 watts but produces the same light output as a standard 25 watt bulb.