I think it would have taken another 20 years. Also by saying consumers rejected it based on initial price points even though they saved an average of $50.00 per bulb over their lifetime only serves to prove my point regarding  non critical thinking individuals messing up the vaunted "market forces". BTW:a better light bulb has existed for years now; the LED! Your last comment makes no sense to me Carpa but it apparently does to you. Translation is in order.