*Floralyte II has an on/off pull tab and is activated by pulling the white tab down and de-activated by pushing the pull tab up. *Battery life of the lighting unit is 48+ hours. *Floralytes are about 1.5" long x 0.75" wide x 0.25" thick. *Each FloraLyte comes with loop for fastening and a black elastic string. *Floralyte II is priced individually. Use FloraLytes to illuminate flower arrangements, design props, table settings, corsages, serving trays, candle votives, ice sculptures and much, much more. The FloraLytes can also be used for practically any design element including costumes, masks, place settings, art lighting, interior design and accent lighting to name a few. They make great party favors as well. Floralyte II are not designed to be used in water. If submersed in water, the Floralyte will last approximately 8-10 hours and the water will start to discolor after a couple of hours. It is best to use [[submersible floralytes]:url=http://www.partybrights.com/category/submersible_floralytes/] if you cannot change the water every 6 hours. Not for use in edible items.