Analyzing 7,135,4157.1M ReviewsFor 20,29120.3K Experts
We graded 3 companies on seven things customers actually report: satisfaction, reliability, workmanship, value, momentum, track record and how owners handle complaints.
From 11,098 Google reviews of 68 top-rated outdoor lighting installers nationwide; 3 of them in Diamond Bar, CA. Updated November 2, 2026.
Pick the job — we re-rank companies by how customers rated that exact job.
Experts Score 0–100Experts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. and a letter grade per factor (A = top 20% of outdoor lighting installers).
| # | Company | ScoreExperts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. | FactorsFactor grades, in orderSatisfaction (54%): Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.Reliability (24%): How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.Craft & service (0%): Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.Value (14%): Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Momentum (0%): Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.Replies to reviews (7%): How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.One letter per factor score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = below 20. | ★Google star rating as shown on Google Maps. | Typical billMedian bill customers of this company reported in their reviews (needs 3+ priced reviews). |
|---|---|---|---|---|---|
| 1 |  The Recessed Lighting Company™Diamond Bar, CA | A 96How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%98+57.5Reliability 26%97+25.3Value 15%100+15.2Craft & service penalty83−1.7Experts Score= 96Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAA– | 4.97 | — |
| 2 |  Innovative Light Designs | Landscape & Outdoor Lighting Orange CountyDiamond Bar, CA | B 77How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 69%80+55.4Reliability 31%76+23.4Craft & service penalty98−0.2Momentum penalty82−1.8Experts Score= 77Not enough data for value, replies to reviews; its weight is shared by the others.Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | ABA–A– | 4.84 | — |
| 3 |  EverLightsDiamond Bar, CA | B 63How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 64%74+47Reliability 28%59+16.7Replies to reviews 8%55+4.5Momentum penalty44−5.6Experts Score= 63Not enough data for value; its weight is shared by the others.Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | BC––CC | 4.76 | — |
What customers paid, from the price Google asks reviewers to report.
| Job | Low25th percentile: 1 in 4 customers paid less than this. | TypicalMedian of the bill customers reported in their Google review (Google asks reviewers for a price range; we use the middle of each range). | High75th percentile: 1 in 4 customers paid more than this. | FairOf customers who rated the price, the share who chose “Great price” or “Reasonable” rather than “Overpriced”. |
|---|---|---|---|---|
| Light fixture installation | $64 | $238 | $591 | 100% |
| Electrical outlet & switch repair | $93 | $248 | $351 | 100% |
| Electrical outlet & switch installation | $135 | $278 | $415 | 100% |
| Electrical outlet & switch relocation | $135 | $412 | $913 | 96% |
| Electrical wiring installation | $293 | $667 | $1.3k | 99% |
| Electrical panel replacement or upgrading | $1.3k | $2.4k | $4.7k | 100% |
| Installation | $109 | $351 | $888 | 98% |
| Fan installation | $130 | $423 | $556 | 97% |
| Electrical panel repair | $135 | $295 | $529 | 100% |
| HVAC system maintenance | $26 | $78 | $228 | 98% |
| Electric car charger installation | $351 | $808 | $1.3k | 100% |
| HVAC system repair | $78 | $490 | $758 | 100% |
How the 3 outdoor lighting installers we rated in Diamond Bar, CA compare, and what customers praise most.
A = score 80+, F = below 20.
Average stars per company.
Share of Google review highlights.
All price verdicts left with reviews.
Share calling it great / reasonable / overpriced.
Satisfaction (54%) — Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.
Reliability (24%) — How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.
Craft & service (penalty, up to −10) — Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.
Value (14%) — Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.
Momentum (penalty, up to −10) — Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.
Replies to reviews (7%) — How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.
The 4 best-rated outdoor lighting installers in Diamond Bar, CA average 4.9★ on Google across 391 reviews. Orange County Night Lights Inc. has the top rating (5.0★). Updated November 1, 2026.
4 companies that meet our bar: rated 4.5★ or higher on Google, with a meaningful review history (391 reviews combined) and currently operating. Request a call back and the company will phone you directly.
“Very happy with the service provided by this company for my yard lighting system, which operates perfectly now. Matt provides outstanding customer service and will carefully evaluate your needs, discuss your options…” — Google review
“We’ve used them twice now, first to install can lights in our secondary bedrooms and then again to install a large chandelier in our family room. Both experiences were excellent. They are super friendly, always…” — Google review
“Everlights service repairman (Chase) came out today and was outstanding - he was on time, explained the problem and how it would be fixed in a timely manner…I highly recommend!” — Google review
“What an amazing experience! The installation team of Miguel, Daniel and Angel were the best! They worked quickly and clean. Not a single cord is visible. The team was extremely conscientious and communicative. They…” — Google review
We scan Google Maps for outdoor lighting installer listings in and around Diamond Bar, keep only open businesses whose main category matches the service, and require a Google rating of at least 4.5 from at least 20 reviews. Companies are ordered by a confidence-weighted score that balances rating and review volume. We do not accept payment for placement.
Orange County Night Lights Inc. has the highest Google rating on our Diamond Bar list: 5.0 out of 5 from 184 reviews (as of November 1, 2026).
Orange County Night Lights Inc. has the most Google reviews among the companies listed here: 184, with a 5.0★ average.
Only open Diamond Bar-area businesses whose Google category matches the service, rated at least 4.5★ from at least 20 Google reviews. They are ordered by a confidence-weighted score of rating and review volume. Placement is never paid.
Analyzing 7,135,4157.1M ReviewsFor 20,29120.3K Experts