Induction Lighting has a bulb life rating of up to 100,000 hours. (up to 22.5/12hr. days)
HPS is rated for 20,000 hours.
Induction Lighting has slow lumen depreciation (light loss) and can maintain up to 70% of original lumens for 60,000 hours or more.
HPS has fast lumen depreciation similar to metal halide. Bulb life is twice as long as metal halide. This is why it may be chosen as an alternative to metal halide in high reach areas. It is just not the best choice.
Induction Lighting is nearly maintenance free for the rated life of the bulb/ballast and carries a 5 year warranty.
HPS takes more maintenance and has no known warranty.
Induction Lighting has a high color rendering index (CRI) of 80+ . This makes colors much more vivid.
HPS has a low CRI of 20 - 22. This is why colors are so hard to see with this intense "yellow" light.
Induction Lighting has a high S/P ratio of 2.0 + . This makes the lumens per watt more efficient.
HPS has a low S/P ratio of .62. This low number reveals wasted "unseeable" lumens.
Induction Lighting has a high visual acuity "seeable" lumens per watt of 191.
HPS has only 67 lumens of "seeable" lumens per watt. This reveals poor efficiency with the need for nearly 3 times more watts than the crisp white light of induction.
Induction Lighting is instant-on and instant re-strike.
HPS is delayed up to 10 minutes.
Induction Lighting is better for the environment using only 5 - 6mg. of amalgam (dentist style mercury) per bulb which is in a solid form and easy to recycle.
HPS uses 10 - 50mg. of mercury and is difficult in it's form to recycle. The 10 mgs. of mercury from only one 48 inch fluorescent bulb can make 6,000 gallons of water unfit to drink. It will take 5 of these HPS bulbs in the environment to compete with the life of one induction bulb and 10 times more mercury exposed.
Induction Lighting operates at a much cooler 150F - 180F degrees.
HPS operates at 450 to 750F degrees. This is much hotter and impactful to the environment.
Induction lighting is clearly the best choice. Please research the product listing for your lighting needs. Carolina Induction Lighting is a distributor for induction products and can retrofit most existing fixtures or install new as well. Call or email us with questions or needs.