Spectral
Analysis of 250W Mogul base Metal Halide Lamps - PART II
Continuing
with data from the spectral analysis of 250W Mogul base lamps
presented in Part I [Ref. 11], this article presents the data
on the remaining nine 250W mogul base lamps along with the comparison
of all the 250W mogul lamps.
11.
PFO 13000K
Table
12: PFO 13000K lamp with Different Ballasts
Ballast
Power
Input
Volts
Input
Amp
PPFD
CCT
HQI
(M80)
333
122.1
3.02
75.73
19396
IceCap
255
122.2
2.29
43.9
17387
Standard
(M58)
292
123.4
2.78
45.3
33425
.
Figure
11: Spectral Plot of the PFO 13000K lamp on different
ballasts.
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12.
Radium 20000K
Table
13: Radium 20000K lamp with Different Ballasts
Ballast
Power
Input
Volts
Input
Amp
PPFD
CCT
HQI
(M80)
333
121.8
2.94
85.3
na
IceCap
244
121.4
2.25
66.71
na
Standard
(M58)
Did not fire
.
Figure
12: Spectral Plot of the Radium 20000K lamp on different
ballasts.
13.
Sun Aquatics 10000K
Table
14: Sun Aquatics 10000K lamp with Different Ballasts
Ballast
Power
Input
Volts
Input
Amp
PPFD
CCT
HQI
(M80)
336
120.8
3.06
149.1
6561
IceCap
244
122.9
2.19
104.8
6591
Standard
(M58)
272
122.5
2.76
111.1
7031
.
Figure
13: Spectral Plot of the Sun Aquatics 10000K lamp
on different ballasts.
14.
Sun Aquatics 14000K
Table
15: Sun Aquatics 14000K lamp with Different Ballasts
Ballast
Power
Input
Volts
Input
Amp
PPFD
CCT
HQI
(M80)
342
122.4
2.97
64.2
na
IceCap
255
122.7
2.31
47.7
na
Standard
(M58)
264
123.4
2.62
38.9
na
Reef
Fanatic
256
123.2
2.18
46.3
na
.
Figure
14: Spectral Plot of the Sun Aquatics 10000K lamp
on different ballasts.
15.
Sun Aquatics 20000K
Table
16: Sun Aquatics 20000K lamp with Different Ballasts
Ballast
Power
Input
Volts
Input
Amp
PPFD
CCT
HQI
(M80)
306
122.7
2.78
76.1
na
IceCap
250
121
2.34
66.3
na
Standard
(M58)
229
123.5
2.52
45.6
na
Reef
Fanatic
256
123.2
2.18
67.9
na
.
Figure
15: Spectral Plot of the Sun Aquatics 10000K lamp
on different ballasts.
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16.
Sunburst 12000K
Table
17: Sunburst 12000K lamp with Different Ballasts
Ballast
Power
Input
Volts
Input
Amp
PPFD
CCT
HQI
(M80)
346
121.2
3.15
85.6
na
IceCap
253
121.2
2.32
65.2
na
Standard
(M58)
305
123.7
2.83
68.08
na
Reef
Fanatic
256
122.3
2.2
61.7
na
.
Figure
16: Spectral Plot of the Sunburst 12000K lamp on different
ballasts.
17.
USHIO 10000K
Table
18: Ushio 10000K lamp with Different Ballasts
Ballast
Power
Input
Volts
Input
Amp
PPFD
CCT
HQI
(M80)
361
122
3.29
159.1
8697
IceCap
249
121.4
2.27
85.3
9727
Standard
(M58)
320
123.1
2.84
118.2
8921
.
Figure
17: Spectral Plot of the Ushio 10000K lamp on different
ballasts.
18.
XM 10000K
Table
19: XM 10000K lamp with Different Ballasts
Ballast
Power
Input
Volts
Input
Amp
PPFD
CCT
HQI
(M80)
374
122
3.27
182
9921
IceCap
256
123
2.31
115.8
11543
M58
315
123.5
2.8
137
12083
ReefFanatic
257
122.6
2.2
115.5
13017
.
Figure
18: Spectral Plot of the XM 10000K lamp on different
ballasts.
19.
XM 20000K
Table
20: XM 20000K lamp with Different Ballasts
Ballast
Power
Input
Volts
Input
Amp
PPFD
CCT
HQI
(M80)
360
122
3.22
79.3
na
IceCap
240
123.1
2.16
53.5
na
M58
319
123.4
2.87
73.6
na
ReefFanatic
257
122.9
2.19
61.9
na
.
Figure
19: Spectral Plot of the XM 20000K lamp on different
ballasts.
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Comparison
of the lamps and discussion:
Figures
20,21 and 22 show a comparison of all of the lamps. Figure 20,
provides a comparison of these lamps when used with different
ballasts. As seen from this figure, the Iwasaki 6500K has the
most PPFD independent of the ballast used. For all lamps, the
M80 ballast sold in the hobby as the "HQI" ballast had the highest
output, but at the cost of more power. Whether this is detrimental
to the lamp life is yet to be established. Figure 21, shows
the plots of power consumption and PPFD for all the lamp ballast
combination tested in this article. Figure 22, 23 and 24 show
the superimposed spectral plots of the lamps.
Figure
20: PPFD of all lamps with different ballasts
Figure
21: PPFD vs Power Consumed for all lamps with different
ballasts
Figure
22: Spectral Plot of all 6500K-10000K lamps on M80
ballast
Figure
23: Spectral Plot of all 12000K-15000K lamps on M80
ballast
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Figure
24: Spectral Plot of all 20000K lamps on M80 ballast
Conclusion:
As
seen from the data and plots, there is wide variation among
the lamps and the use of CCT to designate the lamps is pretty
much meaningless given that the spectral plots are often very
similar yet the lamps are being sold with different color temperatures.
Hopefully this article will help the aquarist in separating
fact from advertising hype !!
Once
again the usual disclaimer applies - this data is based on a
sample size of one, and we have no idea what the variation is
within lamps. How long these lamps retain their PPFD output
remains to be seen.
As
seen from the data, the Reef Fanatic electronic ballast is very
similar to the Icecap Electronic ballast in terms of lamp output
and power consumption, based on the 5 lamps tested with this
ballast.
Further
comparison with the 250W DE Lamps [Ref. 9 and a forth coming
article] will reveal that there is no justification for the
sweeping statement "250W DE lamps have more PPFD output than
250W Mogul base lamps".
Acknowledgements:
We
would like to thank several people whose help made this study
possible. Joe Burger for sending me all the lamps that he used
in his tests. Patrick at PFO Lighting, Brian at HelloLights.com,
Perry at Sunlight Supply, Venki at Sun Aquatics, Ed at Aquaconnect,
Andy at IceCap and Bob at Reef Fanatic. Finally, we would like
to thank Dr. Paul Walker of Penn State University for the use
of the spectroradiometer and dark room for testing the lamps.
Joshi, S. and
Morgan D., 2001. "Spectral Analysis of Metal Halide Lamps
- Do Ballasts Make a Difference," 2001 Annual Marine
Fish and Reef USA, Fancy Publications. Reprint available
here
Joshi, S. 2002,
"Spectral Analysis of Recent Metal Halide Lamps: Part IV-
10000K and 12000K lamps," 2002 Annual Marine Fish and
Reef USA, Fancy Publications.
