Technical Information Guide





  • If the exterior of the lamp is damaged, replace lamp immediately.
  • Disconnect power before re-lamping.
  • When re-lamping, make sure lamp has time to cool before touching.
  • Make sure power cord and lamp cord are connected properly.
  • Do NOT hang by power cord or lamp cord.
  • Do NOT make contact with the interior of the socket while the power is on.
  • Do NOT operate the light systems in wet locations.
  • Do NOT plug this system into a supply voltage other than what is instructed on the ballast.
  • Do NOT attempt to open, rewire or reconfigure any components of the light system. It will void the warranty and could cause serious injury or death.
  • These products operate at very high temperatures. Keep away from children.
  • Do not plug or unplug a lamp cord while the ballast is turned on.
  • Do not use with generators. Warranty will be voided.
  • The Lite Pipe™, Sun Tube™ and Digital Fusion™ all need to be air cooled.
  • Glass required in reflectors when using metal halide (MH) lamps for UL listing to apply. Not required with high pressure sodium (HPS) lamps.

Bulb Information:

Proper Bulb Care

Bulbs should be replaced every year to maintain maximum lumen output.

Fluorescent Fixtures

If there are bulbs that will not fire, try swapping the bulbs around for others that are working. This will help determine if the bulbs are defective.

Reflector Mounting Heights

A general guideline for the proper hanging height of an H.I.D. lamp would be 12”- 48” depending on wattage (see below). Make sure to check for excessive heat at the top of your plants by placing your hand (palm down) over your plants. If the top of your hand is hot, you need to move your lamp up higher. If the light source is too close to your plants, you can burn them. Remember that as your plants grow you will need to adjust the height of your lamp.

Please keep in mind that the latest air-cooled reflectors, like the Magnum XXL allow you to place higher wattage bulbs closer to plants than was possible in the past.

When you raise the light up & away from your plants, you need to be aware that the light levels to your plants will be significantly reduced.

As light moves away from its source (the lamp) it diminishes as follows: 1/Distance2. For example: 1 ft. = 1000 FTC, 2 ft. = 250 FTC, 3 ft. = 111 FTC, 4 ft. = 63 FTC, 5 ft. = 40 FTC, & 6 ft. = 28 FTC (FTC = foot candle).

Coverage Area

A fluorescent fixture can be placed much closer to plants than an H.I.D. fixture because it produces very little heat. You should place your fluorescent lights as close to the tops of your plants as you can without excluding the outside perimeter of your garden.

H.I.D. Average Coverage Aera by Wattage

  • 150/175 watts covers approximately 2’ x 2’ area
  • 250 watts cover approximately 3’ x 3’ area
  • 400 watts covers approximately 4’ x 4’ area
  • 600 watts covers approximately 6.5’ x 6.5’ area
  • 1000 watts covers approximately 8’ x 8’ area

NOTE: Coverage area may be reduced if this is your primary light source and will vary among reflectors.


  1. CHECK YOUR ELECTRICAL SOURCE: Make sure the unit is plugged in properly and that the breaker is not tripped or fuse blown.
  2. CHECK THE LAMP: Make sure the lamp is screwed in all the way.
  3. FOR T5 FLUORESCENT FIXTURES: Check to ensure lamps are properly locked into place. This is accomplished by turning the lamps ¼ turn in either direction.
  4. Try a different lamp if you have one available. Make sure unit is unplugged when changing lamps.
  5. Make sure you have the correct lamp for your ballast, i.e. an HPS lamp will not ignite with a MH ballast.
  6. MVP™ (Multi Volt PowerCord): When using a MVP™ plug, only use the one distributed with the unit or purchased at one of our Authorized Retailers. DO NOT make any changes to the Power Cord. This will VOID the warranty.


Symptom: My ballast is humming but the light isn’t coming on.

Solution: There may be a couple of reasons for this: 1) the lamp is not screwed in tight enough, or 2) the lamp is defective. Please allow 5 - 10 minutes for lamps to initially ignite. If this does not solve the problem, return the unit to the dealer for testing.

Symptom:My ballast makes an excessive amount of noise.

Solution: Keep in mind that the higher the wattage, the louder the humming noise emitted. However, if the noise level is extreme, the transformer may have come loose. In this case, the ballast unit should be returned to Sunlight Supply®, Inc. for repair if it is still under warranty and has been used under normal operating conditions.

Symptom: Every time I turn on the light fixture, the circuit breaker trips.

Solution: You may have too many appliances on this circuit. A normal home’s circuit has only 15 amps available. These H.I.D. lights use up to 10 amps per unit. Please make sure you are not overloading the circuit with too many appliances and/or lights. Note: The sticker on the ballast will state the number of amps required by that particular unit. If you do require more lights/appliances to all be run off the same circuit, you should consult an licensed Electrician.

Symptom: I turned off my HID light and now it won’t come back on.

Solution:Your lamp may take up to 20 minutes to cool down before it can be fired up again. Fluorescent lamps should be almost immediate.

Symptom: My lamp has small pieces of glass inside of it.

Solution:It is common for small pieces of glass to break loose inside the lamps; this will not affect the lamps output. If there is a crack or hole in the outer glass, it should be replaced.

How do I know my lamps are functioning normally?


  • It may take HID or T5 fluorescent 10-15 minutes to come to full brightness.
  • HID: During the first few hours of use, the light from the lamp might oscillate.
  • HID: The light will decrease in intensity during the life of the lamp.
  • HID: During the first hours, intensity of the light may fluctuate somewhat, which is normal. However after it reaches 100 hours of “burn in” time, will continue evenly the remainder of it’s life (with normal aging reduction).
  • Both: Average life of a MH (metal halide) lamp is 12,000 hours for a 1000 watt lamp and 20,000 hours for a 400 watt lamp. The rated hour life of a HPS lamp is 24,000 hours. Most users choose to replace lamps before they cease to operate due to lumen loss and spectral shift. T5 fluorescent lamps offer a rated hour life of 20,000 hours and have a much slower lumen loss and spectral shift than HID lamps.


On average, a light system will increase your electricity cost from $8 to $20 per month—the exact amount depends on the size of the system and the number of hours operated. However, since these grow lights are so energy efficient, you are getting huge amounts of light (and growing power) for your money! Make sure your grow room’s power circuit can handle the power draw. For safety reasons, do not exceed 75% of the rated ability of the fuse/ breaker (for example: use no more than 15 amps on a 20 amp circuit). To calculate your cost, multiply the bulb wattage X hours of operation and divide by 1000. This figure is the number of kilowatt hours of electricity consumed. (Example: a 400 watt bulb running for 18 hours will use 7.2 kilowatt hours). Check your power bill for the cost of each kilowatt hour. Then multiply the number of kilowatt hours by the cost of a kilowatt hour (K/hr) to arrive at the cost per month to run the light in your area.

WARRANTY SERVICE: Please read warranty information first

If after reviewing the troubleshooting tips the light will still not work, you should return the light to the store. We then will be able to further evaluate the light and test its various components and quite possibly will be able to identify and/or fix any problems. Often the problem is as simple as a defective lamp. If We are unable to fix the light, we will return it to the manufacturer for factory repair.Please package the light carefully in its original packaging.