• Q: What are the advantages to using LED luminaires?
  • A: LEDs bring several advantages to the lighting industry, including high efficacy and durability, and, with superior life over other lamp sources, their required maintenance is greatly reduced. This translates into energy savings, maintenance savings, and environmental sustainability. There is also the potential for greater optical control (more controllable source), dimming, instant on/off, and reduced rate of lumen depreciation (potential for long application life).

  • Q: Are HUMITSU LED lights ultra-efficient?
  • A:Compared to conventional technologies, HUMITSU LED Lighting products can deliver the same amount of light using as little as 10 to 15% of the power. This huge reduction in energy consumption can enable consumers to save hundreds of dollars over the life of each light.The Value of HUMITSU LED LightingA HUMITSU LED Lighting product, like the HMS-B3W, can replace a 25 watt light while using only 3 watts. In its 50,000 hour lifetime it will consume about 525 kilowatt-hours, costing about $63. During that time, it will never need to be replaced.The Cost of Incandescent LampsA typical 65 watt light lasts for 2,000 hours. To match the light output and longevity of a HUMITSU LED Lighting downlight, traditional lighting would consume 3,250 kilowatt-hours, and need to be replaced about 25 times, costing over $465. It's a simple story...saving over $400 in electric and relamping costs, for every LED BULB you replace.

  • Q: Are your products EnergyStar certified?
  • A: All of our products that have an EnergyStar category are EnergyStar approved.

  • Q: Can LED lights make my life easier?
  • A: HUMITSU LED Lighting products are designed to last as long as 50,000 hours. Incredible longevity means that you might never change another light again.A Generation of LightWhat is 50,000 hours? It is 50 times the life of a typical incandescent bulb and 5 times the lifetime of an average compact fluorescent lamp (CFL). In fact, if you ran one HUMITSU lamp for 6 hours per day every day, it would last for nearly 23 years. That is five presidential elections, time for a home remodeling, and the expanse of an entire generation.Reduce Maintenance and Labor We all have at least one bulb that is hard to reach and needs a ladder or a pole to replace it. For a home owner, fifty times longer life than incandescent bulbs means 50 fewer chances to fall off a ladder. For a business owner, it means significantly lower maintenance and labor expenses.Reduce Your Waste StreamThe production and use of LEDs requires significantly less energy than incandescents or CFLs. With HUMITSU LED Lighting products, you'll throw away fewer lamps and stop worrying about their mercury content. All HUMITSU LED Lighting products are free of mercury and other toxic materials, a clear win for the environment.

  • Q: What's the difference between efficiency and efficacy?
  • A: Lighting fixture efficiency is the ratio of the total lumens exiting the fixture to the total lumens initially produced by the light source. For example, if a bare 100W incandescent lamp (light bulb) produces 1,000 lumens, and it is put into a lamp fixture that delivers 700 lumens, this would be an example of a 70% efficient fixture. Efficacy is a term normally used in cases where the input and output units differ. In lighting, we are concerned with the amount of light (in lumens) produced by a certain amount of electricity (in watts). Efficacy = Lumens Per Watt

  • Q: Does turning LED lighting on and off reduce lifetime?
  • A: No. Unlike incandescent and fluorescent lighting which will fail sooner when switched on and off more often, LED lighting is unaffected by how often it is switched on and off.

  • Q: How do you evaluate LED products?
  • A: Lumen output is only part of the story and can be misleading. To fully evaluate an LED product one needs to review the overall system efficiency, optical control, thermal management of the LEDs, and know at what point in time the fixture will reach 30 percent lumen depreciation. Products with good optical efficiency and thermal management will be able to deliver more lumens, on average, than traditional HID products. As the Department of Energy concluded in its Solid-State Lighting Commercial Product Testing Program: "Until the field of SSL technologies and supporting knowledge matures, any claims regarding performance of SSL luminaires should be based on overall luminaire efficacy (i.e., from testing of the entire luminaire, including LEDs, drivers, heat sinks, optical lenses and housing), to avoid misleading buyers and causing long-term damage to the SSL market."

  • Q: How do you verify the performance of your products?
  • A: The performance of all of our products is verified by accredited independent 3rd party laboratories.

  • Q: How long is 100,000 hours?
  • A: Based on how long a fixture is illuminated per day, here's what 100,000 works out to: Hours of Operation:  100,000 hours is: 

24 hours a day            11.4 years 

18 hours per day         14.8 years 

12 hours per day         22.8 years 

8 hours per day           34.2 years

  • Q: What does "Lifetime 50,000 hours" mean?
  • A: Useful life has been defined as the number of hours an LED device can operate until it emits only a certain percentage of its original lumen output. For general illumination applications, vision research suggests that 70 percent of original lumen output is the level where end users begin to notice a drop in light levels. The Illuminating Engineering Society of North America (IESNA) published LM-80-08, IES Approved Method for Measuring Lumen Maintenance of LED Light Sources. HUMITSU tested our LED lamps for long-term lumen maintenance consistent with LM-80 methods to demonstrate life after more than 6000 hours of testing and got the number 50,000 hours under normal operating conditions. Also the performance of all of our products is verified by accredited independent 3rd party laboratories. Please note, any initial condition or parameter change will affect the useful life of LEDs in different ways.

  • Q: What is an LED?
  • A: Light-emitting diodes (LEDs) are solid-state lighting components. Each LED consists of a semiconductor diode that emits light when a voltage is applied to it. They have no moving, fragile parts and can last for decades. LEDs can be many times more energy-efficient than light bulbs, depending on the application. LED lighting can save up to 85 percent of the electricity used by incandescent bulbs and up to 50 percent of electricity used by fluorescents.The electronics industry has used LED technology for several decades as indicator lights for various electronic devices. In more recent years, LED technology has progressed to the point where it is viable for general lighting applications.Most of the energy emitted from incandescent bulbs is converted to heat instead of light. That’s why you’ll burn yourself if you try to touch an incandescent bulb once it’s turned on. Since LEDs consume significantly less energy, they don’t emit as much heat. That’s why you typically won’t burn yourself if you try to touch an LED light once it’s turned on. LED lights are also designed to last about 50 times longer, which means less ladder-climbing maintenance and less waste. For further information about LED technology, check out the US Department of Energy.

  • Q: What is CRI, and why is it important? 
  • A: Color Rendering Index (CRI) is defined as a light sources ability to render color. The higher the CRI, the better the light source renders every color in the visible spectrum. To have what is generally considered good color rendering, a source must be >90 CRI.

  • Q: What is junction temperature?
  • A:Junction temperature is the temperature at the point where an individual diode connects to its base. Maintaining a low junction temperature increases output and slows LED lumen depreciation. Junction temperature is a key metric for evaluating an LED product's quality and ability to deliver long life.The three things affecting junction temperature are: drive current, thermal path, and ambient temperature. In general, the higher the drive current, the greater the heat generated at the die. Heat must be moved away from the die in order to maintain expected light output, life, and color. The amount of heat that can be removed depends upon the ambient temperature and the design of the thermal path from the die to the surroundings. [Source: DOE]The Department of Energy advises: "Heat management and an awareness of the operating environment are critical considerations to the design and application of LED luminaires for general illumination. Successful products will use superior heat sink designs to dissipate heat, and minimize junction temperature. Keeping the junction temperature as low as possible and within manufacturer specifications is necessary in order to maximize the performance potential of LEDs."

  • Q: What's the difference between 2700K and 3500K?
  • A: Correlated Color Temperature (CCT) is defined as the color of light given off by a particular light source that most closely represents the light emitted from a perfect blackbody radiator when heated to a certain temperature.  Incandescent lamps have a typical CCT of 2700K (warm white light).  Fluorescent lamps can have CCT's varying from 3000K to 5000K (cool white light).  3500K is generally considered "neutral" white light. 

  • Q: Why are LEDs considered a GREEN technology?
  • A: LEDs are environmentally friendly on many fronts. First, unlike HID (High Intensity Discharge) lamps LEDs contain NO mercury. In addition, some LED luminaires are RoHS (Restriction of Hazardous Substances) compliant and have been designed to provide more than a decade of near maintenance-free service. That means no re-lamping which means no waste. Assuming an HID fixture is re-lamped every two years, that’s five re-lamping cycles over a 10 year period.  Just imagine the benefits of choosing LED: 

•    No concern over proper disposal (hopefully not simply thrown in a landfill) of old HID lamps containing harmful mercury.   

•    No fuel used and the accompanying pollution to service those fixtures. 

•    Greatly reduced potential for lane closures and other productivity and inconvenience-related costs associated with maintaining an HID system. 

•    No natural resources lost to produce the replacement lamps that contain mercury. 

•    No fuel used to move old-technology lamps from the factory (most likely overseas), to the distributor, to the contractor, to the job site.   

It’s important to keep in mind all the positive and powerful ripple effects that using LED technology can have on the environment.