--- title: Regency Insights Blog | Expertise and Education in Commercial Lighting | Energy Efficiency description: Energy Efficiency | The Regency Insights Blog is managed by Regency Supply, a commercial lighting and electrical distributor with distribution centers across the United States. --- - [Corporate](https://www.regencysupply.com/) - [Shop](https://shop.regencysupply.com/) - [Studio](https://rl.studio/) [Login/Signup](https://shop.regencysupply.com/b2b/portal/login/) [![Regency Supply Logo](https://regencysupply.com/wp-content/uploads/rs-logo-r-2.svg)](https://regencysupply.com/) Menu - [Search Site](https://www.regencysupply.com/searching/) - [Shop Products](https://shop.regencysupply.com/) - [Services](https://www.regencysupply.com/services/) - [Architectural Lighting Design](https://www.regencysupply.com/services/architectural-lighting-design/) - [Lighting Supply](https://www.regencysupply.com/services/lighting-supply/) - [Electrical Supply](https://www.regencysupply.com/services/electrical-supply/) - [Construction Services](https://www.regencysupply.com/services/construction-supplier/) - [Lighting Retrofits](https://www.regencysupply.com/services/lighting-retrofits/) - [Lighting Maintenance](https://www.regencysupply.com/services/maintenance/) - [Product Lines](https://www.regencysupply.com/lighting-solutions-and-services/product-lines/) - [Client Success Stories](https://www.regencysupply.com/lighting-solutions-and-services/client-success-stories/) - [Resources](https://www.regencysupply.com/lighting-resources/) - [About Us](https://www.regencysupply.com/about-regency-lighting/) - [Leadership](https://www.regencysupply.com/about-regency-lighting/leadership-team/) - [Evan Regenstreif](https://www.regencysupply.com/about-regency-lighting/leadership-team/evan-regenstreif/) - [Isaac Regenstreif](https://www.regencysupply.com/about-regency-lighting/leadership-team/isaac-regenstreif/) - [Judah Regenstreif](https://www.regencysupply.com/about-regency-lighting/leadership-team/judah-regenstreif/) - [Scott Anderson](https://www.regencysupply.com/about-regency-lighting/leadership-team/scott-anderson/) - [Hoon Kim](https://www.regencysupply.com/about-regency-lighting/leadership-team/hoon-kim/) - [Ron Regenstreif](https://www.regencysupply.com/about-regency-lighting/leadership-team/ron-regenstreif/) - [Mike Goldstone](https://www.regencysupply.com/about-regency-lighting/leadership-team/mike-goldstone/) - [Careers](https://www.regencysupply.com/about-regency-lighting/careers/) - [Regency Supply News](https://news.regencysupply.com/) - [Event And Social Photos](https://www.regencysupply.com/about-regency-lighting/event-and-social-photos/) - [Contact Us](https://www.regencysupply.com/contact-us/) - [Credit Application](https://www.regencysupply.com/contact-us/credit-application-for-lighting-services/) - [Apply For Tax Exemption](https://app.certcapture.com/logins/login) - [Office Locations](https://www.regencysupply.com/contact-us/#rl-locations) - [Search](https://www.regencysupply.com/searching/) - [Store Login](https://shop.regencysupply.com/) ### REGENCY INSIGHTS BLOG Trusted advice for lighting, electrical, and more. #### Articles about Energy Efficiency [The 5 biggest LED buying mistakes businesses can easily avoid August 29, 2023 at 9:35 AM](https://insights.regencysupply.com/the-5-biggest-led-buying-mistakes-businesses-can-easily-avoid) [Types of EV Charger Rebates July 28, 2023 at 10:24 AM](https://insights.regencysupply.com/types-of-ev-charger-rebates) [Is it worth upgrading old linear LEDs to new LEDs? July 20, 2023 at 9:40 AM](https://insights.regencysupply.com/is-it-worth-upgrading-old-linear-leds-to-new-leds) [The three most common EV charger installation delays May 20, 2023 at 1:21 PM](https://insights.regencysupply.com/the-three-most-common-ev-charger-installation-delays) [EV Charger Rebate Trends for 2023 May 3, 2023 at 10:50 AM](https://insights.regencysupply.com/ev-charger-rebate-trends-for-2023) [How much does it cost for businesses to install EV chargers? April 7, 2023 at 9:33 AM](https://insights.regencysupply.com/how-much-does-it-cost-for-businesses-to-install-ev-chargers) [What kind of EV charger is best for businesses? March 6, 2023 at 9:25 AM](https://insights.regencysupply.com/what-kind-of-ev-charger-is-best-for-businesses) [Good news for LED lighting upgrades: What EPAct 179D really means September 6, 2022 at 9:21 AM](https://insights.regencysupply.com/lighting-retrofits-what-epact-179d-really-means) [What is Title 24 and how do you make sure your lighting complies with it? February 17, 2022 at 9:40 AM](https://insights.regencysupply.com/what-is-title-24-and-how-do-you-make-sure-your-lighting-complies-with-it) [Lighting Rebate Trends for 2021 March 22, 2021 at 12:27 PM](https://insights.regencysupply.com/lighting-rebate-trends-2021) [3 steps to retrofit from T12 to LED July 29, 2020 at 9:53 AM](https://insights.regencysupply.com/here-are-your-led-replacement-options-for-t12-fluorescents) [How to recycle fluorescent lighting and electronic waste March 16, 2020 at 9:27 AM](https://insights.regencysupply.com/recycling-options-for-lighting-and-electronic-waste) [Energy code changes for 2020 \[And how they impact lighting\] February 5, 2020 at 10:35 AM](https://insights.regencysupply.com/energy-code-changes-2020) [Steps to retrofit hotel lighting January 27, 2020 at 12:44 PM](https://insights.regencysupply.com/lighting-retrofit-hotels) [The phase out of T12s: Everything you need to know about discontinued tubes December 23, 2019 at 11:00 AM](https://insights.regencysupply.com/the-phase-out-of-t12s-everything-you-need-to-know-about-discontinued-tubes) [Do your lighting products need to be UL listed or ETL listed? And what about DLC and Energy Star? November 20, 2019 at 9:15 AM](https://insights.regencysupply.com/ul-listed-or-etl-listed) [What is a ballast factor and how does it affect fluorescent tubes? October 29, 2019 at 9:45 AM](https://insights.regencysupply.com/what-is-a-ballast-factor-and-how-does-it-affect-my-fluorescent-tubes) [4 ways to reduce energy costs at healthcare facilities October 10, 2019 at 2:15 PM](https://insights.regencysupply.com/reduce-energy-costs-healthcare-facilities) [Title 20 explained: California's energy efficiency standards for lighting August 7, 2019 at 3:15 PM](https://insights.regencysupply.com/title-20-explained-californias-energy-efficiency-standards-for-lighting) [How to purchase LED lighting on a tight budget July 11, 2019 at 9:30 AM](https://insights.regencysupply.com/how-to-purchase-led-lighting-on-a-budget) [Common light bulbs and LED upgrades for hotels December 3, 2018 at 11:53 AM](https://insights.regencysupply.com/common-light-bulbs-and-led-upgrades-for-hotels) [Common light bulbs and LED upgrades for commercial offices November 14, 2018 at 1:37 PM](https://insights.regencysupply.com/common-light-bulbs-and-led-upgrades-for-commercial-offices) [Common incandescent light bulbs and LED retrofits by application September 5, 2018 at 4:05 PM](https://insights.regencysupply.com/incandescent-light-bulbs-led-retrofits) [Do you feel stuck in LED indecision? April 9, 2018 at 11:48 AM](https://insights.regencysupply.com/do-you-feel-stuck-in-led-indecision) [Answering your questions on energy savings \[Ask the expert series\] April 3, 2018 at 11:48 AM](https://insights.regencysupply.com/answering-your-questions-on-energy-savings-ask-the-expert-series) [Here are some lumen per watt (LPW) targets for common LEDs October 23, 2017 at 2:15 PM](https://insights.regencysupply.com/lpw-targets-for-led-lamp-types) [Regency works with US government to better illuminate San Ysidro-Tijuana border September 26, 2017 at 5:10 PM](https://insights.regencysupply.com/regency-works-with-us-government-to-better-illuminate-san-ysidro-tijuana-border) [Here are 4 hot LED lighting rebate programs that could jumpstart your next retrofit August 30, 2017 at 3:10 PM](https://insights.regencysupply.com/a-glance-at-some-of-the-best-lighting-rebates-in-the-country-right-now) [How to calculate HVAC energy savings from lighting: A step-by-step guide July 5, 2017 at 9:20 AM](https://insights.regencysupply.com/how-to-calculate-hvac-energy-savings-from-lighting-step-by-step-guide) [Five questions to ask if you're considering LED lighting for your commercial office June 9, 2017 at 5:25 PM](https://insights.regencysupply.com/when-should-i-consider-linear-led-for-my-commercial-office) [Who should use Regency's LED Buying Guide? April 18, 2017 at 3:55 PM](https://insights.regencysupply.com/who-should-use-regencys-led-buying-guide) [How to calculate labor savings from a lighting retrofit: A step-by-step guide March 6, 2017 at 5:05 AM](https://insights.regencysupply.com/how-to-calculate-labor-savings-from-long-life-lighting-step-by-step-guide) [2017 second-to-last year of 50% bonus depreciation on building improvement projects February 24, 2017 at 5:40 PM](https://insights.regencysupply.com/2017-second-year-of-50-bonus-depreciation-on-energy-efficient-building-improvement-projects) [How to use Regency's lighting calculator: Calculating energy savings from a lighting retrofit January 13, 2017 at 3:15 PM](https://insights.regencysupply.com/how-to-use-regencys-lighting-calculator-calculating-energy-savings-from-a-lighting-retrofit) [Explaining the 2016 Title 24 standards that went into effect in 2017 December 15, 2016 at 10:20 AM](https://insights.regencysupply.com/updates-to-title-24) [How one Dallas parking garage increased light levels and achieved 14-month payback while using 500 fewer fixtures in LED retrofit October 31, 2016 at 5:00 PM](https://insights.regencysupply.com/how-one-dallas-parking-garage-increased-light-levels-and-achieved-14-month-payback-while-using-500-fewer-fixtures-in-led-retrofit) [The difference between kW and kWh in lighting retrofits \[calculator\] September 29, 2016 at 4:10 PM](https://insights.regencysupply.com/difference-between-kw-kwh-lighting) [How one hotel achieved nearly 60-percent first-year ROI on its LED retrofit September 21, 2016 at 11:20 AM](https://insights.regencysupply.com/hyatt-60-percent-roi-led-retrofit-conversion) [How does ballast factor affect energy savings calculations in lighting? September 1, 2016 at 3:05 PM](https://insights.regencysupply.com/how-does-ballast-factor-affect-energy-savings-calculations-in-lighting) [What does it mean for a product to be DLC listed? July 8, 2016 at 5:20 PM](https://insights.regencysupply.com/what-does-it-mean-for-a-product-to-be-dlc-listed) [Why should I choose ENERGY STAR certified lighting products? June 30, 2016 at 3:30 PM](https://insights.regencysupply.com/why-should-i-choose-energy-star-certified-lighting-products) [How much does lighting cost? Understanding the Total Cost of Lighting May 26, 2016 at 8:55 AM](https://insights.regencysupply.com/how-much-does-lighting-cost-understanding-the-total-cost-of-lighting) [How to convert fluorescent tubes to LED \[Top replacement options\] May 24, 2016 at 10:30 AM](https://insights.regencysupply.com/factors-to-consider-before-you-look-for-a-linear-fluorescent-retrofit) [LED lighting advantages for businesses January 12, 2016 at 12:00 PM](https://insights.regencysupply.com/led-lighting-advantages-for-businesses) [New product options for lighting retrofits December 15, 2015 at 2:30 PM](https://insights.regencysupply.com/new-products-options-for-lighting-retrofits) [How to calculate return on investment (ROI) and payback for your lighting project November 17, 2015 at 1:00 PM](https://insights.regencysupply.com/dollars-and-sense-how-to-calculate-return-on-investment-roi-and-payback-for-your-lighting-project) [Revisiting Title 24 lighting requirements: Navigating the complexity November 13, 2015 at 4:04 PM](https://insights.regencysupply.com/revisiting-title-24-requirements-a-look-at-title-24-lighting-projects) [How to calculate material savings from long-life lighting: A step-by-step guide November 3, 2015 at 3:47 PM](https://insights.regencysupply.com/how-to-calculate-material-savings-from-long-life-lighting-step-by-step-guide) [How to calculate energy savings for lighting only: A step-by-step guide October 20, 2015 at 10:30 AM](https://insights.regencysupply.com/how-to-calculate-energy-savings-for-lighting-only-step-by-step-guide) [Show your work: The plain truth behind lighting retrofit savings October 13, 2015 at 3:00 PM](https://insights.regencysupply.com/show-your-work-the-plain-truth-behind-lighting-retrofit-savings) HQ 9261 Jordan Avenue Chatsworth, CA 91311 **Phone:** [+1-800-284-2024](tel:+18002842024) **[Send us a message.](http://www.regencysupply.com/contact-us/contact-us/)** **[Find a location.](https://www.regencysupply.com/contact-us/#RS-locations)** Family owned and operated since 1983 [![](https://www.regencysupply.com/wp-content/uploads/rs-main-badge-w.svg)](https://insights.regencysupply.com/newname) What's the story with our rebrand? [Learn more.](https://www.regencysupply.com/newname) [![RSS](https://www.regencysupply.com/wp-includes/images/rss.png)](https://insights.regencysupply.com/rss.xml) [Lighting Insights](https://insights.regencysupply.com/) - [4 reasons lighting causes developers' schedules to fall behind on construction projects](https://insights.regencysupply.com/4-reasons-lighting-causes-developers-schedules-to-fall-behind-on-construction-projects) Aug 1, 2022 - [What is DLC v5.1 and how does it impact my lighting purchase?](https://insights.regencysupply.com/what-is-dlc-5.1) Jul 26, 2022 - [Trends in pricing and quality in LED lighting](https://insights.regencysupply.com/trends-in-pricing-and-quality-in-led-lighting) Jul 19, 2022 - [California's light bulb ban](https://insights.regencysupply.com/california-light-bulb-ban) Jul 13, 2022 - [Is there an incandescent light bulb ban?](https://insights.regencysupply.com/was-there-actually-an-incandescent-light-bulb-ban) Jul 11, 2022 - [A state by state look at light bulb bans \[Interactive map\]](https://insights.regencysupply.com/state-light-bulb-bans) Jul 6, 2022 #### Looking for products? 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