Spectrally enhanced halides provide the best all-purpose light for growth and flowering * Emits more of the red wavelength than common halides * Considered the Gold standard in plant growth lighting, with thousands in use by satisfied gardeners worldwide * In a 4.5" Geranium test 45% More Flowers Produced, 25% More Axillary Branching! * * This halide horizontal bulb make plants grow their best * Best all purpose growth and fruit/flowering light you can use * Emits more of the red wavelengths than common halides * Gold standard in plant growth lighting, and thousands are in use by satisfied gardeners worldwide * Outperform common sodiums in 4-1/2-inch geranium test