HPS vs Light Emitting Diode vs Hybrid Cost
Comparison for Indoor Garden
Electricity Costs Calculated for One 6' x 8' (1.83m x 2.44m) Plot in an Indoor Garden
 
Watts
Hours Per Day
Days Per Year
Watt Hours Per Year
KW Hours Per Year
Cost Per KWHR
Cost Per Year
10 LGM5 LED
90
16
395
568,800
568
.09
$51
1 1000 watt HPS
1075
16
395
6,794,000
6,794
.09
$611
Hybrid 8 LGM5
w/600 w HPS
72 Watts LED
600 w HPS
16 LED
4 HPS
395
1,403,040
1,403
.09
$126
      The costs calculated here are for an indoor garden where artificial lighting will be the only source of light (no sunlight).  There are many applications that
are suitable for using only LEDs.  Overwintering, plant maintenance, tissue culture, algae, or extending photoperiod and providing supplemental light in a
greenhouse all fall in this category.  One can grow fruits and vegetables under only LED Grow Master lighting but you should expect smaller plants (a short
internode length) as well as natural growth rates.  Using the hybrid system we are able to almost triple this rate of growth to the level that High Pressure
Sodium gardeners have come to expect while still saving a significant amount of money and energy over the lifetime of our LED grow lights.   
Based on the average price of electricity in the United States in USD 2010.  Seventy-five watts added to 1000 watt bulb to account for the electrical draw of ballast.
Hybrid assumes 600 watt  High Pressure Sodium is on for 4 hours per day with the LEDs running the entire photoperiod.
Cumulative Cost Comparison
LED Assumptions-

*Lifetime:  Using a 16 hour photoperiod LED Grow Master lighting is estimated for a 17 year lifetime.

  *Initial Cost:
          LED Only- 10 LGM5s at $260 per piece = $2,600
           Hybrid System- 8 LGM5s at $260 per piece = $2,080
HPS Assumptions-

   *Lifetime: Using a 16 hour photoperiod HID bulbs are estimated for a 12 month lifetime.  Ballasts are calculated for a 6 year lifetime.

  *Initial Cost:
       HPS Only- One 1000 watt Electronic Ballast = $393
        Hybrid System- One 600 watt Electronic Ballast = $259

  *Replacement Bulbs:
            1000 watt = $69
              600 watt= $79
Hybrid Assumptions-
  *Lifetime:  Using the hybrid system requires an average of 4 hours of "on-time" extending the life of the HPS bulbs to two years and the ballast to eight.
Year
1
2
3
4
5
6
7
8
9
10
LEDs
$2,651
$2,702
$2,753
$2,804
$2,855
$2,906
$2,957
$3,008
$3,059
$3,110
HPS
$1,073
$1,753
$2,433
$3,113
$3,793
$4,473
$5,546
$6,226
$6,906
$7,586
Hybrid
$2,544
$2,670
$2,875
$3,001
$3,206
$3,332
$3,537
$3,663
$4,127
$4,253
Cumulative Cost Comparison Factoring Electricity Use and Replacement Costs of Plant Lighting
LEDs have payback by year 4 in both the LED only and Hybrid system.  Note that  the LEDs are rated for a seventeen year lifetime
meaning they are able to pay for their own replacements and add extra money to your pocket. !!!
Do you receive natural lighting in your garden and just want to supplement or extend photoperiod?
Click here for coverage recommendations.
Toll Free in the US and Canada 1-866-414-7244              Fax  541-610-1973             International Inquiries to 1-541-504-6360            Email LED Grow Master Global, LLC at info@led-grow-master.com