Figure 3.1. Relative light output of a T5 Extreme
Temperature lamp in relation to the lamp
ambient temperature
Figure 3.2.Typical run-up curve of a T5
Extreme Temperature lamp
Figure 3.3. Lumen maintenance of T5 Extreme
Temperature lamps
Run-up curve — T5 Extreme Temperature
Lumen output —T5 Extreme Temperature lamp
Lumen maintenance — T5 Extreme Temperature
Lumen output curves
In figure 3.1., the relative light output of a typical T5 Extreme
Temperature lamp in relation to the lamp ambient temperature is
shown. The light output is more than 90% between 65°F and 170°F.
Run-up curves
In order to secure a fast run-up of the lamps, they are equipped
with auxiliary amalgams at both ends of the lamp. The auxiliary
amalgam increases the mercury vapor pressure after ignition of the
lamp. Within 3 minutes the lamp will reach 80% of its final output.
In figure 3.2. a typical run-up curve of a T5 Extreme Temperature
lamp is shown.
Lumen maintenance
The lumen maintenance of T5 Extreme Temperature lamps will
be at 90% at 40% of rated average life. See figure 3.3.
32˚F
50˚F
68˚F
86˚F
104˚F
122˚F
140˚F
158˚F
176˚F
32˚F
50˚F
68˚F
86˚F
104˚F
122˚F
140˚F
158˚F
176˚F
0˚C
10˚C
20˚C
30˚C
40˚C
50˚C
60˚C
70˚C
80˚C
0˚C
10˚C
20˚C
30˚C
40˚C
50˚C
60˚C
70˚C
80˚C
105
100
95
90
85
80
75
70
65
60
105
100
95
90
85
80
75
70
65
60
Ambient Temperature ˚C
(˚F)
Ambient Temperature ˚C
(˚F)
Relativ
e
Light
Output
(%)
Relativ
e
Light
Output
(%)
Standard F54 T5 HO Lamps
T5 Extreme Temperature Lamps
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
100%
98%
96%
94%
92%
90%
88%
100%
98%
96%
94%
92%
90%
88%
Lamp Operating Hours
Lamp Operating Hours
Light
Output
(%)
Light
Output
(%)
OEM Design Guide
Philips T5 VHO and HO Extreme Temperature Lamps and Ballasts
9
