Philips T5VHO manual Introduction, Optimum operation of T5 lamps with amalgam technology

1.General information on the Philips T5 VHO and HO Extreme Temperature system

1.1. Introduction

Philips T5 VHO and HO Extreme Temperature are fluorescent lamps with a diameter of about 0.63 in with the latest technologies incorporated. These T5 VHO (Very High Output) and HO (High Output) Extreme Temperature lamps have temperature optimized performance and have a high lumen output in a very broad temperature range (65–170°F). This performance is achieved by adding an amalgam to the lamp. Furthermore, two auxiliary amalgams are used for a faster system run-up.

Philips T5 VHO Extreme Temperature lamps are especially designed for mid-bay and high-bay applications with typical mounting heights of 16 feet and above, such as factories, sports arenas, train stations, warehouses, airports, and many more. The advantages of fluorescent lighting in these applications are good light distribution, beam control, instant hot restrike, long life, dimmability and low maintenance costs.They are also well suited for compact and indirect lighting fixtures where ambient temperature is a critical element.

Philips T5 HO Extreme Temperature lamps are especially designed for cold and warm applications, such as coolers, outdoor luminaires, unconditioned warehouses, compact luminaires (e.g. wall washers) or hot factory environments. The lamps can be used in luminaires where currently the same types with cold spot technology are used.

Philips T5 VHO and HO Extreme Temperature lamps are designed for operation with high frequency electronic ballasts for maximum efficacy.

The Philips T5 Extreme Temperature range consists of the following types:

T5 VHO 95W Extreme Temperature (46 in)

T5 HO 54W Extreme Temperature (46 in)

Features of Philips T5 VHO and HO Extreme Temperature ranges The lamps have the following characteristics:

•A high initial lumen output of approximately 7,200 lumens for the VHO lamps

•A lumen output of more than 90% of the maximum lumen output between 65°F and 170°F (lamp ambient temperature) due to amalgam technology

•A fairly constant lumen level during lamp life due to a tri-phosphor layer in combination with new coating technologies

•Narrow lamp diameter of about 0.63 inches

•Good color rendering (85 CRI)

•Rated average life of 25,000 burning hours at a 3 hr switching cycle

•Rated average life of 35,000 burning hours at a 12 hr switching cycle

•Low mercury

•To secure an optimal and hassle free operation, T5 VHO lamps have a lamp cap with flattened pins which only fit into Gx5 lamp holders

1.2.Optimum operation of T5 lamps with amalgam technology

The luminous flux of a low-pressure mercury lamp is determined by the mercury vapor pressure in the lamp. In an amalgam lamp, the mercury vapor pressure is determined by the amalgam itself and not by the coldest spot in the lamp as with regular PhilipsT5 HE and HO lamps. An amalgam is an alloy of mercury and other metal(s) and ensures a near-constant mercury pressure over a wide temperature range. As a result of that, the lumen output is more than 90% of the maximum lumen output between 65°F and 170°F.

They are available in the color temperatures 835 and 841.

OEM Design Guide Philips T5 VHO and HO Extreme Temperature Lamps and Ballasts 3