1 | And the SuperBulb, as a product, was turning out to have some problems. | |
2 | The number of lumens a bulb produces for each watt it consumes. | |
3 | Today, about one-third of fluorescent tubes are recycled at the end of their life span. | |
4 | Heat management, power supply, and drivers - the bulbs' controlling circuit boards - get more complex. | |
5 | Large numbers of Chinese workers have been poisoned by mercury, which forms part of the compact fluorescent lightbulbs. |