The projected increase in the use of compact fluorescent lamps (CFLs) motivates the development of methods to manage consumer exposure to mercury and its environmental release at the end of lamp life. This work characterizes the time-resolved release of mercury vapor from broken CFLs and from underlying substrates after removal of glass fragments to simulate cleanup. In new lamps, mercury vapor...

Compact fluorescent emergency luminaires present unique challenges. Not only must the emergency gear and ballast be crammed into small confines of the luminaire but there is the additional problem of excessive temperature to deal with. This paper describes the design of an optimal electronic ballast/emergency control unit specifically aimed at the South African market where the traditional swit...

Plants will be an important component of future long-term space missions. Lighting systems for growing plants will need to be lightweight, reliable, and durable, and light-emitting diodes (LEDs) have these characteristics. Previous studies demonstrated that the combination of red and blue light was an effective light source for several crops. Yet the appearance of plants under red and blue ligh...

Extensive development of designs and prototyping of energy efficient torchiere systems using compact fluorescent lamps (CFLs) has lead directly to the production of CFL torchieres by a major US manufacturer. This paper compares the electrical and photometric characteristics of one of the new CFL torchieres to standard tungsten halogen torchieres (halogen uplighters). Power assessments and gonio...

In Part I of this article, we considered the technology and economics of alternative lighting systems, both electric and fuel based, demonstrating that there are ample and cost-effective opportunities for energy savings. In this second and final part, we consider some of the barriers that hinder the implementation of energy-efficient lighting. These barriers may be overcome by measures such as ...

The translocation of (14)C-photosynthate in detached blades of sugarcane was studied under illumination from red, green, blue, and cool-white fluorescent lamps; under far-red illumination from the sun, and from incandescent lamps; and in total darkness.The percentage of basipetal translocation and the accumulation against the concentration gradient were stimulated by light from the red or blue ...

We summarized the mercury flow of mercury-containing products from their manufacture to their disposal in Japan and discussed the current management of mercury-containing hazardous household waste (HHW). The mercury flow originating from these products was estimated to be about 10-20 tonnes annually, about 5 tonnes of which was attributable to fluorescent lamps, the major mercury-containing pro...

457 July 2014, Vol. 104, No. 7 Recommendations for the handling of fluorescent lamps in public schools in Johannesburg, South Africa To the Editor: Fluorescent lamps are regarded as hazardous waste because of their mercury content.[1] Mercury has toxic properties that may have acute or chronic detrimental impacts on human health and the environment.[2-4] A study was recently undertaken with the...