TOEIC Link LED Retrofit Vocabulary: The Audit-Proposal-Rebate-Payback Cluster for Part 4 and Part 7

A lighting retrofit proposal is one of the densest number documents the exam uses. In a single page you will find a fixture count, a cost per fixture, a total project cost, a rebate amount, a net cost, an annual saving, and a payback period — and at least two of those numbers exist only to be confused with each other.

The cluster runs in four stages. An energy audit counts what is installed now. A proposal prices the replacement. A rebate application reduces the price, on the utility's schedule rather than the customer's. Installation happens in phases, usually after hours.

The questions rarely ask you to calculate anything hard. They ask which number answers the question — the cost before or after the rebate, the saving per year or over the contract term. Knowing which noun attaches to which figure is the whole skill.

Consumption itself is read off the bill, which is the utility billing and meter reading cluster. The installation is logged like any other building job, so it shares vocabulary with the facilities maintenance and work order cluster, and the one category of light that a retrofit may not simply swap out is covered by the emergency lighting and exit sign inspection cluster.

Why the exam likes this cluster

Two totals, one project. Gross cost and net cost after rebate both appear, usually within a few lines of each other. The question specifies one.

The rebate has its own calendar. Pre-approval before work starts, an application deadline, and a payment that arrives weeks after completion. A question about when money is received is not answered by the installation date.

Savings are annual; costs are one-time. Mixing the two produces the wrong payback period, which is the single most common trap in the cluster.

Work happens at night. Occupied offices are retrofitted after hours or floor by floor, which generates scheduling questions that look unrelated to energy at all.

Stage 1 — the energy audit

Verbs and collocations: conduct a walk-through audit, count the fixtures, log the wattage, measure light levels, identify candidates for replacement, benchmark against last year, assess the existing controls.

Nouns: energy audit, walk-through, fixture, lamp, ballast, wattage, kilowatt-hour, operating hours, light level, baseline, inventory. Fixture is the housing; lamp is the bulb inside it. The audit counted 640 fixtures, most holding two lamps each. A question asking how many lamps will be replaced needs both numbers, and a choice offering 640 is testing whether you noticed each.

Ballast is the component that has to be removed or bypassed in a fluorescent-to-LED conversion. Fixtures with failing ballasts will be replaced outright rather than retrofitted. This is where a proposal splits into two line items at two prices.

Operating hours drive the whole calculation. The garage lights run 8,760 hours a year; the office floors run about 3,100. A question about why the garage is done first is answered here, not by cost.

Baseline is the "before" figure everything is compared to. The baseline is last year's consumption, adjusted for the vacant fifth floor. A choice using unadjusted consumption misses the qualifier.

Stage 2 — the proposal

Verbs and collocations: submit a proposal, itemize by floor, quote a unit price, include disposal, exclude emergency fixtures, estimate annual savings, guarantee the fixture for five years.

Nouns: scope of work, unit price, labor, materials, disposal fee, subtotal, contingency, annual savings, payback period, warranty, exclusion. Scope of work tells you what is and is not included. The scope covers floors 2 through 7; emergency and exit fixtures are excluded and will be addressed under a separate contract. Exclusions are where the second-best answer choice lives.

Payback period is cost divided by annual saving. Net cost of ¥2.4 million against annual savings of ¥800,000 gives a payback of three years. If a question's stated payback does not match, check whether the writer used the gross cost — that is the intended trap.

Disposal fee appears because old lamps are regulated waste. A disposal fee of ¥180 per lamp is included in the unit price. A choice listing disposal as an extra charge contradicts included.

Warranty covers the product, not the labor, unless the text says otherwise. Fixtures carry a five-year warranty; labor is warranted for one year. Questions ask about year three, and the answer is parts only.

Stage 3 — the rebate

Verbs and collocations: apply for a rebate, obtain pre-approval, reserve funding, submit invoices, qualify for the prescriptive rate, verify installation, issue payment within 60 days.

Nouns: utility rebate, incentive program, pre-approval, application, program year, prescriptive rebate, custom rebate, per-fixture incentive, cap, verification, funding pool. Pre-approval is the trap that ruins projects. Work started before pre-approval is not eligible. A passage that mentions an eager contractor ready to begin next week is setting up exactly this question.

Prescriptive versus custom: prescriptive pays a fixed amount per qualifying fixture; custom is calculated from projected savings and takes longer to process. The prescriptive rate is ¥3,000 per fixture, capped at ¥1.5 million per site. Note the cap — it is why a rebate is smaller than fixture count times rate.

Program year limits when money is available. Applications must be received by March 31 for the current program year; funds are awarded until the pool is exhausted. Two separate risks in one sentence: the deadline, and running out early.

Verification is the post-installation inspection. A utility representative will verify a sample of the installed fixtures before payment is issued. A question about the last step before the rebate arrives wants this word.

Stage 4 — installation

Verbs and collocations: phase the work by floor, work after hours, coordinate with the tenant, relamp a floor per night, recycle the old lamps, commission the controls, program the occupancy sensors.

Nouns: phase, night crew, after-hours access, floor plan, occupancy sensor, daylight sensor, dimming control, commissioning, punch list, recycling manifest. Phase means the project is split, usually to avoid disruption. Phase 1 covers the parking garage and stairwells; Phase 2 covers the occupied floors. A question about what happens first is answered by the phase list, and the garage usually goes first because it runs continuously.

Occupancy sensor adds savings beyond the lamp swap. Sensors in conference rooms will shut lights off after 15 minutes of inactivity. A savings figure that seems too large for a simple lamp change usually includes controls.

Commissioning is the tuning step after installation. Controls will be commissioned the following week, once the sensors have collected a few days of occupancy data. A choice saying the project finished on installation day skips this.

Recycling manifest is the paper trail for the old lamps. A recycling manifest will be provided for your environmental records. Questions ask what document the customer receives, and this is the one that is not an invoice.

The five traps, in the order they appear

1. Gross cost used where net is asked. Read whether the question says "after the rebate."
2. Annual savings read as total savings. A ten-year figure is ten times an annual one.
3. Pre-approval ignored. Starting early forfeits the rebate, regardless of how good the installation is.
4. Fixture count used as lamp count. Multiply by lamps per fixture where the passage says so.
5. Emergency fixtures assumed included. They are frequently excluded and priced separately.

A worked sequence

A Part 7 triple passage opens with a proposal from an energy services contractor to a property manager. Scope: 480 fixtures on floors 2 through 9. Gross cost ¥4.8 million, including disposal. Estimated annual savings ¥1.2 million. Emergency and exit fixtures excluded.

The second document is a utility program summary. Prescriptive rebate of ¥3,000 per qualifying fixture, capped at ¥1.2 million per building. Pre-approval required before any work begins; applications for the current program year close on March 31. Payment is issued within 60 days of verification.

The third document is an email from the property manager dated March 18, asking whether the contractor can start the week of March 23, since the building is quiet over the holiday.

The questions run down the traps. What is the net cost of the project? ¥4.8 million minus the rebate — and the rebate is the cap, ¥1.2 million, not 480 times ¥3,000, which would be ¥1.44 million. So ¥3.6 million. What is the payback period? Net cost over annual savings: three years. What is the risk in the property manager's proposed start date? Beginning before pre-approval is granted would make the project ineligible. When would the rebate be paid? Within 60 days of verification, which follows installation — not on completion day.

A choice giving a four-year payback is the trap: it divides the gross cost by the annual savings.

What to drill

For every retrofit passage, extract five numbers and label them: gross cost, rebate (and any cap), net cost, annual savings, and payback. Then find two dates: the rebate deadline and the earliest permitted start. If the passage mentions someone wanting to begin work soon, check the pre-approval sentence before answering anything about scheduling. In this cluster, the fastest plan is usually the one that loses the money.