LED Grow Master Global
A-Frame
5' x 8' sides with LEDs mounted 37" from middle of rows between A-Frames to top of A-Frame at an angle.  
Assumes LEDs move every 12 hours to opposite side.  Each 5' x 8' side could hold 24- 10" x 20" propagation
trays.   The 16' x 20' conservatory could hold 2 tables down the middle stacked two high with 1/2 racks along
each side for a total of 12 sides or 480sq feet of growing space.  The LED grow lights is very versatile.  
There are many configuration options available. For the sake of this comparison we will compare 24 LGM550
LED grow light bars to 4 1000 watt HPS lamps.


Electrical Cost Comparison
Electricity Costs- For the sake of this comparison we assume both HPS and LEDs are moved to the second
half of the greenhouse every 12 hours.  Supplemental lighting is calculated for 365 days a year to average
daily operation costs.
LED Grow Light Example Layout and
Comparison A-Frame
Electricity Costs Calculated for twelve 5' x 8' plots arranged in A-Frames.  Total of 480 square feet of grow
area.  Electricity costs based on the Department of Labor Statistics average US prices in August of 2011.  
These prices become more important as energy prices continue to rise.
Average Electrical Cost Per Day for LGM LED Grow Light: $0.67
Average Electrical Cost Per Day for 1000W bulbs: $13.00
Electrical Savings 95%
  Watts
 Hours Per Day
 Days per Year
 Watt Hours
Per Year
 KW Hours Per
Year
 Cost per
KWHR per year
 Cost Per Year
24 LGM5s
 216
 24
 365
 1,892,160
 1,892
 .13
 $246
4 1000w HPS
 4,200
 24
 365
 36,792,000
 36,792
 .13
 $4,873
Cumulative Cost Comparison-
           1.  LED Assumptions-
                   a. Lifetime: LED Grow Master Grow Lights are rated for 100,000 hours.  According to a 24 hour   
                           photoperiod the LED grow light is estimated for an 11 year lifetime.
                  b.  Initial Cost:  24 LGM5s at $299.00 per piece= $7,176.00

          2.  HPS Assumptions-
                  a.  Lifetime:  Given a 24 hour photoperiod the HPS bulbs would be replaced each year.  Ballasts are
                          calculated for a 5 year lifetime.  
                  b. Initial Cost:  4- Sunlight Supply's 1000W Commercial Greenhouse plant lighting systems with ballast,
                          reflector, and bulb. Priced at $424.00 per piece= $1,696.00 (Calculated year 1,6,11)
                  c. Bulb Replacements: 4- 1000w HPS plant bulbs at $79.00 each = $316.00 (calculated year 2, 3, 4, 5, 7,
                          8, 9, 10)
                  d. Disposal Fees: (HPS classified as hazardous waste)= 4 * 2.50= $10.00 (Calculated every year after
                          first.)
Cumulative Cost Comparison Factoring Electric and Replacement Costs Over Lifespan of LED grow light.
Year
 1
 2
 3
 4
 5
 6
 7
 8
 9
 10
 11
LEDs
 $7,422
 $7,668
 $7,914
 $8,160
 $8,160
 $8,652
 $8,898
 $9,144
 $9,390
 $9,636
 $9,882
HPS
 $6,479
 $11,588
 $16,697
 $21,806
 $26,915
 $33,404
 $38,504
 $43,604
 $48,704
 $53,804
 $60,293
Total Savings of LED Grow Light in Comparison to HPS Lighting= $51,041.00
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