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Streetlights and Perennials: No Negative Effect from Sodium Vapor Lamps

Dr. Paul Thomas (UGA Horticulture) confirms: sodium vapor streetlights don't affect perennial flowering. Most perennials are long-day plants unresponsive to nighttime light levels or wavelengths.

Bottom Line

Install the streetlight without concern for your perennial bed. The orange glow won't disrupt bloom cycles or growth.

About Gardening: Plant Lights vs. Grow Lights: Same Thing, Proper Usage; Vanda Ascocenda Grow Lights: Heat Issues, Humidity Priority; Optimal Fluorescent Light Duration for African Violets; Low-Light Nepenthes for Reptile Terrariums: N. ampullaria and N. ventricosa; LED Grow Lights for Nepenthes: Worth It?; Choosing Plant Lights for Carnivorous Plants: Wattage and Setup; Using 400W HPS Light for Nepenthes: Winter Supplement Only; Fixing Leggy Seedlings Under Grow Lights; Grow Lights Demystified: Types, Spectra, and How to Choose for Indoor Growing; Indoor Plant Lighting: Fluorescent Lights Must Be Close

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