Lighting Comparison Chart

TECHNOLOGY DESCRIPTION 400 w HPS LU400 400 w M HMVR400U 1000 w M HMVR1000U F96T!2 HO8' 2L HO F32T8/Electr GE Starcoat
1. COLOR RENDERING 22 65 65 72 86
2. LAMP LIFE 24000+ 20000 12000 12000 30000
3. LAMP DEPRECIATION 12% 24% 40% 20% 4.50%
(Calculated at Mean)
97 63 64 66 102
Ballast $80
Lamp $18
Ballast $85
Lamp $30
Ballast $150
Lamp $6.50
Ballast $30
Lamp $2.50
Ballast $19
3 to 4 min 8 to 14 min 8 to 14 min Instant Instant
7. SYSTEM PHOTOMETRY 18" Dome Reflector Point Source 18" Dome Reflector Point Source 18" Dome Reflector Point Source 96"x12" Powder hood Line Source 96"x12" Spec Reflector Line Source
Source: 1998 GE Spectrum 9200 Lamp Catalog
Note: Lamp depreciation shown in the chart above is based on 10,000 burn hours.

TECHNOLOGY 400 w HPS 400 w MH 1000 w MH F96T12 HO F32T8/Elctrc
1. GLARE Harsh Harsh Very Harsh Minimum Minimum
2. SHADOWING/HOT SPOT Common Common Common Uncommon Uncommon
3. SENSOR INTERFACE no no no yes yes
4. IGNITION POTENTIAL none yes none none none

Key Comparison and Accountability for
GPALS Fluorescent vs Hid Metal Halide

  1. Fluorescent Lamps have a higher Lumens per Watt than a HID Metal Halide lampThe G.E XL lamp puts out 107.27 lumens per watt compared to a HID 400 watt Metal Halide lamp which only puts out 87.9 lumen per watt. This means the Fluorescent lamps put out a higher light level than the Metal Halide lamp.
  2. 42% energy savings on fluorescent system vs no energy savings on HID Metal Halide systemIn simple terms the 42% savings on a 100 fixture by 100 fixture comparison would be a 445 watt fixture would cost $58.43 a day to operate, whereas the 194 watt 6 lamp fluorescent fixture would only cost $24.91 to operate per day. This would give a savings of $12,234.80 per year for 100 fixtures.
  3. Fluorescent system maintains foot candles vs HID Metal Halide system loses rapidlyThe fluorescent fixture will maintain the foot candles required by the customer over the 3 year period of the lamp warranty. The HID Metal Halide lamps generally lose foot candle levels within the first 3 months of operation. The rapid lose of foot candles from the HID Metal Halide fixture will cause dark areas and more shadowing. The loose in foot candles by the HID Metal Halide fixtures are a cause of increased employee accidents and poorer quality in workmanship. The fluorescent system allows the foot candles to stay at a maintained preset average. The light quality is higher and better which allows better workmanship, decreased employee accidents.
  4. Less maintenance cost on fluorescent vs High maintenance cost on HID Metal HalideThere is less maintenance cost using GPALS's system compared to a HID. GPALS handles maintenance twice a year for the first 2 years. This means no maintenance personnel will have to worry about changing lamps or ballast. With a HID Metal Halide fixture anytime a lamp goes out a maintenance person has to go and get a new lamp and the equipment needed to get to the fixture. Generally a new HID Metal Halide lamp will cause a weakened ballast to stop running and then the maintenance person has to go back to the same fixture. A lamp and ballast replacement by maintenance will generally cost $180.00 or more. With GPALS there is no cost for the first 2 years.
  5. 3 Year lamp warranty fluorescent vs 1 year lamp warranty HID Metal HalideThe fluorescent lamps are warranted for the first 3 years. This means there is no cost for any lamp failures until the end of the third year. Compared to a HID Metal Halide lamp which generally only carries a 6 month warranty. Most companies do not even try to get the warranty on a HID Metal Halide lamp because of the time involved and the paperwork process cost more than purchasing a new lamp. The average cost of a 400 watt HID Metal Halide lamp is $45.00 compared to a fluorescent lamp at $2.50. In a building that has 100 HID Metal Halide fixtures 77 fixtures will fail or require that lamps be changed. At a average cost of $45.00 per lamp the company will have spent $3,465.00 in a year. This figure does not include any ballast or labor to replace. With the GPALS system the cost for lamps per year is ZERO. A savings alone worth $3,465.00.
  6. Fluorescent relamp every 3 years vs HID Metal Halide relamp every yearAll HID fixtures in a plant environment should be relamped once a year. Metal Halide's start to lose light output after 3 months. There is also color shifting in Metal Halide's that can cause objects to look different than they really are. The average lamp life for a Metal Halide is 12 to 16 months. With the GPALS system the lamps will not need to be relamped except for once every 3 years. There is no color shifting.
  7. Fluorescent still gives light if lamp fails vs HID Metal Halide lamp fails fixture is outAnother benefit of the GPALS system is that if 1 lamp fails the fixture is still lit and work can continue. 1 lamp failure on our system does not cause dark spots or shadowing. With the HID Metal Halide fixture, if a lamp goes out there is a dark area and work can not be performed until that lamp or ballast is replaced. The result is it cost more money when a HID Metal Halide fixture goes out. With our fluorescent system money is not lost but rather capitol is gained.
  8. Fluorescent lights immediately vs HID Metal Halide has a re-strike periodThere is a re-strike time frame that occurs on a HID Metal Halide fixture when it is turned on. What this means is that it may take up to 7 minutes for the HID lamp to be burning at its normal level. This type of period causes work delays. It also is consuming energy unnecessarily. With the GPALS system there is no re-strike so when the fixture is turned on the lamps are automatically at the brightest burning level. Therefore there is no work delays or a waste of energy consumption.
  9. 6 Lamp Fluorescent 194 watts vs 1 Lamp HID 445 watt Metal HalideThe fluorescent system uses only 194 watts per fixture compared to a 400 watt HID fixture which uses 455 watts. This is a energy savings of 42% when using a fluorescent fixture over a HID Metal Halide fixture.
  10. Same amount of fluorescent fixtures as HID Metal Halide fixturesThe replacement is 1 GPALS fluorescent fixture per 1-400 watt HID Metal Halide fixture, so there is true value in the energy savings. Every GPALS system is designed to meet the customers special needs. We look at watts, foot candles, and work areas to insure we install the most energy efficient system there is.
  11. Fluorescent has higher Color Rendering vs Lower HID Metal Halide Color IndexThe color rendering for a HID 400 watt Metal Halide lamp is only 65. The lamp in the GPALS system, which is a G.E. F32T8/XL/SPX41, has a color rending of 86. The F32T8/XL/SPX41 is a high light output lamp and a longer lamp life. Color Rendering is the ability of light source to represent colors in objects. The higher the CRI the more close to natural colors of the object appear. This means that in comparison the Fluorescent lamp gives truer natural colors than a HID Metal Halide lamp. This will increase product quality since employees can see better.
  12. Finally, with the XL lamps the work areas will be brighter. Also, electronic ballast do not put out the heat as associated with the HID ballast. This means that there will be a savings in the HVAC of about 5% since there is not as much heat being generated by the heat from the ballast.