Philips T5VHO User Manual

OEM Design Guide

Philips T5 VHO and HO Extreme Temperature Lamps and Ballasts

Content

3 1. General information on the PhilipsT5 VHO and HO ExtremeTemperature system

3 1.1. Introduction

3 1.2. Optimum operation of T5 lamps with amalgam technology

4 2. Luminaire design

4 2.1. IEC Recommendations

4 2.2. Operating temperatures T5 VHO and HO ExtremeTemperature lamps

5 2.3. General recommendations for handling and measuring T5 lamps and luminaires

5 2.4.Thermal luminaire design and ballast lifetime

6 2.5. Luminaire design and EMI performance

7 2.6. Lamp holder/cap

8 3.T5 VHO and HO Extreme Temperature lamp specifications

8 3.1. Product offerings

8 3.2. Mechanical characteristics

8 3.3.T5 VHO and HO Extreme Temperature publication values

10 4. Ballast specifications for T5 VHO and HO Extreme Temperature lamps

10 4.1. First start-up

10 4.2. Ballast ordering, electrical and technical data

10 4.3. Description of the ballast

10 4.4.Technical data for installation

10 4.5. Switching cycle effects

11 4.6. Wiring diagrams

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 T5VHO (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.

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 theVHO 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 Philips T5

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.

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)

They are available in the color temperatures 835 and 841.

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

2. Luminaire design

2.1. International Electrotechnical Commission

(IEC) Recommendations

The general recommendations for luminaire design by IEC are also

applicable to T5 luminaires. Lamp-related data can be found in IEC

Standards 61195 for safety and 60081 for performance.

2.2. Operating temperatures T5 VHO and HO

Extreme Temperature lamps

2.2.1. Lamp temperatures

The data on the T5 lamps are based on free burning conditions in a

reference circuitry and the lamp should also be tested in that way,

unless stated otherwise.

2.2.2. Maximum temperatures of lamp parts

Luminaires for T5 lamps must satisfy the general requirements for

luminaires as specified by IEC 60598 and, if applicable, comply with

the requirements of local standards.The maximum allowed

temperature of the lamp cap is 248°F, as given in IEC 61195—

Double capped fluorescent lamps—Safety specifications.

2.2.3. Measuring the lamp cap for optimum lamp conditions

In comparison with cold spot mercury lamps, the relation between

light output and cap temperature is less direct with amalgam

lamps. Over a broad temperature range the light output is at a

very high level.

2.3. General recommendations for handling and

measuring T5 lamps and luminaires

2.3.1. Handling

Handling of T5 VHO and HO Extreme Temperature lamps is less

critical than the handling of T5 HE/HO lamps with cold-spot

technology. It is recommended to handle the lamps in a vertical

position with the stamp at the lowest side.

Allow the T5 Extreme Temperature VHO and HO lamps to cool

down for 10 minutes before handling.

4 OEM Design Guide PhilipsT5 VHO and HO Extreme Temperature Lamps and Ballasts

2.3.2. Measuring luminaires for T5 lamps

Before measuring the light output ratio of a luminaire, the T5

Extreme Temperature lamps should be in a stable condition. The

following steps must be taken:

• To bring the lamps to a stable condition, operate the lamps for

approximately 100 hours

• Wait for 12 hours with the lamps turned off

• Measure the top lumen output of the lamps in the photometer

with a measurement time of approximately 15 minutes

• For measuring the total Phi-T curve, a temperature step of

1°F/hr must be applied, starting at a low temperature and going

to a high temperature

2.4.Thermal luminaire design and ballast lifetime

The ballasts for T5 VHO and T5 HO have a T_case max of 194°F

(90°C). To maximize the lifetime and to minimize the failure rate of

the ballast, the ballast should be placed inside the luminaire at a point

where the measuredT_case is lowest.

The time after which 10% of the ballasts have failed is called

the constant failure rate. For a T5 VHO and HO ballast in normal

operation, this constant failure rate is approximately 50,000 hours

at a fixed specified case temperature (194°F). A temperature

increase of approximately 18°F halves this lifetime (thus, 212°F gives

25,000 hrs), while approximately 18°F lower doubles this figure

(176°F gives 100,000 hrs).

2.4.1.Thermal hints and tips

There is an increasing trend towards higher wattages and lumen

outputs in fluorescent lighting, leading to higher internal

temperatures of luminaires.

Every luminaire is different (difference in materials, dimensions,

applications, requirements, etc) so there is not just one simple

solution which helps to prevent overheating of the internal luminaire.

These hints and tips provide some ideas on how to deal with heat

management inside a luminaire.

In the case of T5 VHO, the minimum distance between the lamp

and the reflector must be at least 10mm. Adapting existing T5

luminaires (<54W) for T5 VHO requires more adjustment than

just changing the lamp holders and ballasts.

OEM Design Guide Philips T5 VHO and HO Extreme Temperature Lamps and Ballasts 5