SolisTek High Frequency, Pulse-start Digital Lamps Featuring Low Iron (Low-E) glass for enhanced UVA and UVB penetration to your plants for higher quality and yield! Our special low iron glass allows for more UV spectrums to get to your plants and flowers. Low iron glass is composed of purified materials free from contaminants that make the glass extra clear. Usually glass has a green tint to it, these are impurities possibly from recycled materials. It has been proven that Low-E glass allows more UV light to pass through. Preferred for vegetative stages of growth & finishing. Use during last 1 - 2 weeks of flowering to allow better ripening and finishing. Available in 1000w & 600w. 1000W Specifications for Metal Halide: Initial Lumens: 107,000 Color Temp: 10,000 CRI: 96 Hot Restart 10-15 min ANSI Spec: M141/E Why Digital Lighting? The Sun is high frequency. In order to make artificial light behave more like natural Sunlight it needs to be high frequency. Digital lighting makes for a higher quality of light that Us good for all living things. This is only possible if you have the proper lamp and ballast combination. STK Lamps contain UVA-UVB and the upper portion of UVC. SolisTek High Frequency MH offers: Color Enhanced Full Balanced Spectrum, Superior Photochemical Reactions , Prolonged Lamp Life, Proper UV Balance , Less Depreciation of PAR and Lumen Output over time., Precise Gas Combination for Increased Blues, Reds & UV, Advanced HID Lamp Design , As Reliable & Efficient as Core & Coil (magnetic) when paired with SolisTek Ballasts, True High Frequency Technology, Best Sunlight Replication , Made for Quality, Consistency & Yield, Exercise caution when working around any HID lamp that contains UV, always wear protective lenses.