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Part I: Let’s talk about lighting controls and rebates

Part 1 Lighting Controls Explained and Rebates

 

LIGHTING CONTROLS!!!! SMART LIGHTING CONTROLS!!!! NETWORKED LIGHTING CONTROLS!!!!!!

Doesn't it seem like Lighting Controls are everywhere? Every conference, every trade show? Every marketing piece? And they are so easy to understand and demo, right? 😁

Lighting controls are a proven and effective way to reduce energy usage. Therefore, lighting control technology is interesting to utilities as a way to reach their energy reductions goals through energy efficiency incentives. And so, voila, there are incentives for lighting controls.

 

Most utility programs that incentivize LED technology will also incentivize lighting controls, but the types of lighting controls that are incentivized and how they are incentivized vary greatly.

 

So let’s dig in…

 

Utilities have their own ways to segment the types of lighting controls, and that is the perspective I am presenting in this article, so fair warning, the words I use to segment and describe controls may differ from industry conventions.

 

Lesson 1

There is no standard. There is no standards organization like ENERGY STAR® or the DesignLights Consortium® (DLC®) that sets a common framework or nomenclature for lighting controls, so you can’t rely on the “category name” of the control in utility program documentation, you have to read the fine print.

Wait!!!! The DLC covers controls!? They have product listings!?

Yes, the DLC covers Networked Lighting Controls, which is just one category in many categories of incentivized lighting controls, more on this later...

So to lay some order over this chaos, Encentiv Energy has created a normalized nomenclature that does a decent job of categorizing lighting controls, which breaks down a couple of ways:

 

Lighting control approaches: this is a list of the different techniques that are used to control lights

  • Occupancy/Vacancy
  • Daylighting
  • Photocell
  • Bi-Level Switch
  • Timer/Clock (Yep, still covered by some utilities)
  • Network-enabled capabilities - Networked Lighting Control systems have added a few unique approaches that we will cover later

 

Installation/Configuration approaches - List of the ways the approaches can be packaged and installed into an environment

    • Stand-alone controls
      • Wall-mounted
      • Switch
      • Ceiling-mounted
      • Remote
    • Integral Fixture-mounted
    • Combinations of approaches and mounting types
    • Networked

 

Additionally, lighting control devices can respond to an event with on, off, or dimming.

 

Popularity in Utility Incentive Programs

  1. Occupancy Sensors - The most popular lighting control that is incentivized by utilities. Wall/Ceiling mount are the most frequently incentivized, followed by fixture-mount integral.
  2. Daylighting - Fixture-mounted incentives are the most frequent, followed by various stand-alone varieties
  3. Bi-Level - Tried and true
  4. Networked Lighting Control - The new kid on the block. Rising in popularity, but slowly.
  5. Photocell - Building/Energy Codes are starting to impact the need for incentives for photocells.
  6. Timers

 

Okay, we’ve covered what types of lighting controls are incentivized, but how do the utilities value the incentives. Of course, as a collective, they use a number of different approaches.

 

Four Major Approaches

Fixed

In the fixed case, the incentive is simply a dollar amount paid per fixture or per sensor. For the sensor rebates, some utilities may have a minimum number of fixtures that is controlled per sensor.

 

Watts Controlled 

This incentive type is calculated by determining the number of fixture watts that are controlled by sensors and multiplying that by a value, typically cents. For example $0.09 watts controlled multiplied by 200 watts of fixtures is $18.

 

Square Footage Controlled 

This incentive type is used in a few daylighting incentives and networked lighting control incentives. The approach is to figure out the square footage of lighting that is controlled and multiply that a value, typically cents. For example a 50,000 sqft controlled lighting space in a $0.08/sqft program would get a $4,000 incentives for the controls.

 

Energy Savings 

Custom programs, as well as a number of normal programs use an energy savings approach. Typically this will be either kWh-saved, peak kW-saved or a combination of kWh and peak kW. There are a few utilities where they pay an additional watts reduced incentives on the fixtures just because they are in a controlled environment. We will do a deeper dive into this approach later.

 

Midstream 

Not a major approach in that it is similar to Fixed - Sensor rebates above, but there are a handful of programs that have created midstream rebates, where the rebate is paid that the point of sale through authorized distributors.

 

As you can see, the incentive calculation approaches can vary widely. The energy savings calculations have their sub-approaches as well that bear going into some detail about.

 

We’ve covered a lot of ground today, and the next lighting control topics we'll get into some deep, lengthy detail, so my editor is making me break the information into additional articles. Here's what is up next:

 

Networked Lighting Controls and Energy Savings Incentives
We will delve into the details of both NLC incentives as well as energy saving based incentives. There is a bit of overlap in these topics so makes sense to group together.

 

Lighting Controls Incentive Economics
Where are controls incentives most lucrative, and how do you compare the economics of the different approaches.

 

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Feel free to reach out or comment below with related questions I can answer in these articles. hello@encentivenergy.com

 

Part I is available here.
Mike Cham
Mike Cham
CTO, Encentiv Energy

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