# Source Four HPL Energy Savings

• Below is a document which describes the energy savings you can expect to see by using Source Four fixtures.

 Note that this document does not cover the 750W HPL lamp.

## Energy savings with the Source Four

• The 575 watt Source Four provides up to 40 percent more light than conventional 1,000 watt ellipsoidals while using 45 percent less energy, and 70 percent less energy than 2,000 watt units. The increase in both output and efficiency is due to a finely tuned optical system based on the revolutionary HPL filament design, a faceted, molded dichroic coated reflector and superior lensing.  The Source Four operates with a very efficient lumens per watt ratio, ranging from 19.7 lumens per watt to 11.6 depending on the degree fixture used. Conventional ellipsoidals operate in the 9 to 7 lumens per watt range. This means that for every watt of power used, you get
more light on the stage with the Source Four.

Calculation models for demonstrating energy savings

• All of these words will be useful in presenting your case, but how do you arrive at hard facts to prove the power savings that will let you justify replacing existing equipment with energy efficient, high performance Source Four ellipsoidals? The two calculation models below illustrate the energy savings gained when you use Source Fours. Simply substitute the appropriate numbers as required by your facility.

###### Model 1 for calculating energy savings with Source Four
• Assume an average venue with:

• 250 ellipsoidal fixtures,
• Few or no dark days (set-up, performances, rehearsals, etc.)
• Fixtures on for three hours, 365 days a year
• Fixture intensity rated at 80 percent as not generally run at full for all hours of use.
•
• Conventional rig with FEL, 1000 watt lamps in standard ellipsoidals:
• 250 x 1,000 watt = 250,000 watt
• 250,000 watt x 3 hours = 750,000 watt
• 750,000 watt x 365 days = 273,750,000 watt
• 273,750,000 watt x 80% = 219,000,000 watt yearly

• Same rig using energy efficient Source Fours with 575 watt HPL lamps:
• 250 x 575 watt = 143,750 watt
• 143,750 watt x 3 hours = 431,250 watt
• 431,250 watt x 365 days = 157,406,250 watt
• 157,406,250 watt x 80% = 125,925,000 watt yearly
•
• Comparison of annual usage in watts:
• Rig with conventional ellipsoidals = 219,000,000 watt
• Rig with ETC Source Fours = 125,925,000 watt
• Reduction in wattage = 93,075,000 watt
• Savings in Kilowatt hours = 93,075 kW/hrs
• Annual utility savings with Source Fours = \$9,307.501
•
 - To derive annual power savings, multiply the resulting wattage difference by the local rate - The above example is based on \$.10 per kilowatt hour
###### Model 2 for calculating energy savings with Source Four

Comparison of customer’s existing inventory to the wattage and energy savings gained by replacing inventory with Source Fours.

Conventional Rig:

•  Type Unit Quantity Watts Yearly kW Hrs* Dollar Cost** Altman 4.5 10 750 9,360 \$5,616.00 Altman 6x9 60 750 56,160 \$33,696.00 Altman 6x9 20 1000 24,960 \$14,976.00 Altman 6x12 20 750 18,720 \$11,232.00 Altman 6x12 30 1000 37,440 \$22,464.00 Altman 6x16 20 1000 24,960 \$14,976.00 Total 160 171,600 kW/hr \$17,160.00
• *=Based on three hours per show, eight performances per week, 52 weeks a year.
• **=Based on \$.10 per kilowatt hour. Use the appropriate local rate for your calculations.

• Same rig using energy efficient Source Fours:

•  Type Unit Quantity Watts Yearly kW Hrs* Dollar Cost** Source Four 50 degree 10 575 7,146 \$4,305.60 Source Four 36 degree 60 575 43,056 \$25,833.60 Source Four 36 degree 20 575 14,352 \$8,611.20 Source Four 26 degree 20 575 14,352 \$8,611.20 Source Four 26 degree 30 575 21,528 \$12,916.80 Source Four 19 degree 20 575 14,352 \$8,611.20 Total 160 114,816 kW/hr \$11,481.60
• *=Based on three hours per show, eight performances per week, 52 weeks a year.
• **=Based on \$.10 per kilowatt hour. Use the appropriate local rate for your calculations.
•
• Annual usage Annual cost:
• Altman 171,600 kW/hr \$17,160.00
• Source Four 114,816 kW/hr \$11,481.60
• Savings per year with Source Fours \$5,678.40

HVAC energy savings
Source Four uses less watts than conventional ellipsoidals. Watts equal BTU’s (thermal energy). So if you can reduce the watts at an installation, you will reduce the amount of load that the facility air conditioning plant must carry.  HVAC energy savings of up to one third can be realized with Source Fours during months in which a facility is air conditioned.

5 and 10 degree Source Fours
The energy savings figures become even more impressive when you calculate comparing standard 2,000 spotlights with the ultra efficient Source Four 575 watt 5 and 10 degree ellipsoidals. The 5 and 10 degree Source Four use 70 percent less electricity and operate at 13.9 to 19.7 lumens per watt efficiency.