Editing Susan Lamp PRO
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400 Watt Metal Halide equivalent replacement, 234 LED Array @ 156 Watts | 400 Watt Metal Halide equivalent replacement, 234 LED Array @ 156 Watts | ||
Teh "Susan" Lamp series developed by Lunera launched | Teh "Susan" Lamp series developed by Lunera launched there first generation lights around 2014. These lights bost a 50%+ efficency improvement over Metal Halide with an output of around 15,000 lumens. | ||
In particular the focus here is on the '''SN-VP-E39-400W-4000-G1''', there are also "250W" and "175W" lights in the first gen series. | In particular the focus here is on the '''SN-VP-E39-400W-4000-G1''', there are also "250W" and "175W" lights in the first gen series. | ||
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== Power Profiling == | == Power Profiling == | ||
The following is from a power test of the lamp using a large high current 120VAC rheostat to slowly ramp up the voltage and evaluate the current draw. | The following is from a power test of the lamp using a large high current 120VAC rheostat to slowly ramp up the voltage and evaluate the current draw. Not that LEDs respond somewhat exponentially to voltage adjustments, and a current limited source is the proper way to power these, however these provides valuable information for the design parameters of such an application. | ||
Orange meter is total Current | Orange meter is total AC Current to LEDs | ||
Yellow meter is RMS AC Voltage | Yellow meter is RMS AC Voltage to LEDs | ||
Blue meter is total Wattage INCLUDING losses from rheostat | Blue meter is total Wattage INCLUDING losses from rheostat | ||
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Actually LED wattage consumption can be calculated by Amps * Volts | Actually LED wattage consumption can be calculated by Amps * Volts | ||
Note that volts shown are AC, and feed into a Diode bridge, which generates a 4 Volt drop and rectifies to a DC voltage. So the actual power being consumed by the LEDs is | Note that volts shown are AC, and feed into a Diode bridge, which generates a 4 Volt drop and rectifies to a DC voltage. So the actual power being consumed by the LEDs is (AC Voltage - 4) * Amps == Watts delivered to LEDs. | ||
Measured AC Voltage & Current | |||
<pre> | <pre> | ||
Test Volts Amps Watts | Test Volts Amps Watts | ||
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Calculated DC Voltage & Current | |||
<pre> | <pre> | ||
Test Volts Amps Watts | Test Volts Amps Watts |