[. . . ] SYSTEM PHO High Ambient Temperature ballasts are specifically designed for applications where the ballast is subjected to higher ambient temperatures, as in high bay industrial installations. The four lamp UNV (120-277V) ballast system provides 18, 600 mean lumens, which, when factoring in lumen maintenance and typical T5HO fixture efficiency, can be considered as a direct replacement for standard 400W MH. [. . . ] Unique to the family is the 120-277V 4-lamp "switching" ballast, designed to switch from 4- to 2-, 3- to 2-, 3- to 1- or 2- to 1-lamps. The switching feature can be accessed through a second input power <10% THD Electronic T5HO Fluorescent Programmed Rapid Start Ballasts Normal Ballast Factor HT 2860LV Two lamp fixed output model can be wired for one lamp operation. Key System Features · · · · · · · · · 90°C maximum case temp. Universal voltage (120-277V) Low-profile (1. 00" High) 100% Ballast factor QUICKSENSE ballast technology (end-of-lamp-life sensing) PROStart programmed rapid start UL type CC rated -20°F (-29C) Min. Operates at >40 kHz to reduce potential interference with infrared control systems High power factor Low harmonic distortion Lightweight UL, CSA, FCC terminal. This feature allows for a range of control interfaces, including an occupancy sensor, mounted inside a fixture. SYSTEM PHO HT ballasts contain QUICKSENSE® ballast technology, a patented circuitry designed to shut down the system reliably and safely when lamps reach end-of-life. Setting the standard for quality, SYSTEM PHO HT is also covered by our QUICK 60+® warranty, the first and most comprehensive system warranty in the industry. wire length from ballast case to lampholder): up to 18 feet4 3 Data based on PENTRON HO lamp types for primary ballast application. 4 Operation below 50°F (10°C) may affect light output or lamp operation ­ see "Low Temp. Keep blue and yellow (for 4-lamp model only) leads <10 ft. 1: At 35°C lamp ambient temperature. 2: Ballast Efficiency Factor (BEF) shown = (Ballast Factor x 100) divided by Input Power (Note: calculation based on lowest wattage value). **(49160) QTP 4x54T5HO/UNV PSN HTW: same as 49161, with leads. Installation Notes Switching: Simultaneously disconnect all ungrounded line conductors. Ground ballast case. 25. 4 mm 1. 0" Height 2860LV Dimensions: Model QTP2x54 T5HO/UNV PSN HT enclosure size: Overall: 16. 73"L x 1. 18"W x 1. 0"H (425mm L x 30mm W x 25. 4mm H) Mounting: 16. 34" (415mm) Wiring: Push-in connectors Use 18AWG solid copper wire only See page 66 for wiring diagram. [. . . ] Ground ballast case. 25. 4 mm 1. 0" Height 2860LV Dimensions: Model QTP2x54 T5HO/UNV PSN HT enclosure size: Overall: 16. 73"L x 1. 18"W x 1. 0"H (425mm L x 30mm W x 25. 4mm H) Mounting: 16. 34" (415mm) Wiring: Push-in connectors Use 18AWG solid copper wire only See page 66 for wiring diagram. Packaging: Quantity: 20 (2-lamp) Weight: 2L: 0. 88 lbs each (approx) 414. 0 mm 16. 3" Mounting Length 425. 0 mm 16. 73" Length 30. 0 mm 1. 18" Width 25. 4 mm 1. 0" Height Dimensions: Model QTP4x54 T5HO/UNV PSN HT W enclosure size: Overall: 16. 73"L x 2. 32"W x 1. 0"H (425mm L x 59mm W x 25. 4mm H) Mounting: 16. 34" (415mm) Wiring: Push-in connectors Use 18AWG solid copper wire only See page 67 for wiring diagram. [. . . ]