[Bldg-sim] Lighting fixture retrofit or replacement

Smita Chandra greentsquare at gmail.com
Wed Oct 6 22:18:21 PDT 2010

Going from a 3-lamp to a 2-lamp set up would involve changing out the
fixture, and will typically be done for the entire space together. Such a
replacement of lighting, where all/many fixtures being replaced are still
functioning, is classified as a retrofit. In general, a retrofit involves
replacement before the end of life. The contrasting scenario is called
replace-on-fail (aka replace on burnout) where you change lamps/ fixtures as
they die out. (Not typically done for lighting). What is described here is
therefore a retrofit.

Utility rebate structures vary by utility and are decided based on utility
budgets, program structure (simple rebate versus custom lighting program for
example), aggressiveness of energy savings goals and cost of the retrofit
among other things. A common scenario for commercial lighting retrofits is a
simple rebate program with a set incentive per fixture. This would typically
cover a portion of the expected cost including materials and labor (and any
additional O&M)-- the calculation of which should include delamping-- but
only a portion is covered by rebate. Let's say the new lighting fixture cost
is $60 and labor is $20. That's $80 upgrade cost. Let's say the utility pays
$50 rebate. Whether this rebate covers the cost of delamping per se is
arguable but the 'basis' for calculating the rebate should include it.

Hope that helps.

Smita Chandra
<smita99 at uclalumni.net>

On Wed, Oct 6, 2010 at 10:49 PM, sunayana jain
<sunayana_jain at neo.tamu.edu>wrote:

> Hi all,
> I am looking for incentive rates from electricity supply companies in terms
> of lighting retrofits. So, when I am opting for an option of changing 3-lamp
> T12 magnetic ballast lighting fixture to 2-lamp super T8 electronic ballast
> fixture, will this be considered under lighting retrofit or replacement?
> Also, will the incentive include delamping rebate also?
> Thanks in advance.
> Sunayana Jain
> Energy Engineering Specialist
> Grand Rapids, Michigan
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