![SYLVANIA T8 Gro-Lux Fluorescent Tube Light Bulb, 15W, G12 Bi-Pin Base, 325 Lumens, Non-Dimmable, 5500K – 1 Pack (21657), White - Fluorescent Tubes - Amazon.com SYLVANIA T8 Gro-Lux Fluorescent Tube Light Bulb, 15W, G12 Bi-Pin Base, 325 Lumens, Non-Dimmable, 5500K – 1 Pack (21657), White - Fluorescent Tubes - Amazon.com](https://m.media-amazon.com/images/I/61oC9TtsZvL._AC_UF894,1000_QL80_.jpg)
SYLVANIA T8 Gro-Lux Fluorescent Tube Light Bulb, 15W, G12 Bi-Pin Base, 325 Lumens, Non-Dimmable, 5500K – 1 Pack (21657), White - Fluorescent Tubes - Amazon.com
![What phosphors are/were used in Sylvania Gro-Lux Wide Spectrum and GE and Westinghouse Counterparts? What phosphors are/were used in Sylvania Gro-Lux Wide Spectrum and GE and Westinghouse Counterparts?](http://www.general-cathexis.com/images/Gro-LuxSpectrum.png)
What phosphors are/were used in Sylvania Gro-Lux Wide Spectrum and GE and Westinghouse Counterparts?
![SYLVANIA T8 Gro-Lux Fluorescent Tube Light Bulb, 15W, G12 Bi-Pin Base, 325 Lumens, Non-Dimmable, 5500K – 1 Pack (21657), White - Fluorescent Tubes - Amazon.com SYLVANIA T8 Gro-Lux Fluorescent Tube Light Bulb, 15W, G12 Bi-Pin Base, 325 Lumens, Non-Dimmable, 5500K – 1 Pack (21657), White - Fluorescent Tubes - Amazon.com](https://m.media-amazon.com/images/I/61oC9TtsZvL.jpg)
SYLVANIA T8 Gro-Lux Fluorescent Tube Light Bulb, 15W, G12 Bi-Pin Base, 325 Lumens, Non-Dimmable, 5500K – 1 Pack (21657), White - Fluorescent Tubes - Amazon.com
![Amazon.com: Sylvania 20 Watt T12 Fluorescent Bulb, Gro-Lux Wide Spectrum Phosphor For Plant Growth, Aquarium And Meat Case Applications, 3400K Color Temperature, 89 Cri, - F20T12/Gro/Aq/Ws model number 22013-SYL : Patio, Lawn Amazon.com: Sylvania 20 Watt T12 Fluorescent Bulb, Gro-Lux Wide Spectrum Phosphor For Plant Growth, Aquarium And Meat Case Applications, 3400K Color Temperature, 89 Cri, - F20T12/Gro/Aq/Ws model number 22013-SYL : Patio, Lawn](https://m.media-amazon.com/images/I/21ISnh-bBTL._SR600%2C315_PIWhiteStrip%2CBottomLeft%2C0%2C35_PIStarRatingFOURANDHALF%2CBottomLeft%2C360%2C-6_SR600%2C315_ZA24%2C445%2C290%2C400%2C400%2CAmazonEmberBold%2C12%2C4%2C0%2C0%2C5_SCLZZZZZZZ_FMpng_BG255%2C255%2C255.jpg)