Automotive light bulbs manufacturing · Ohio

Diamond Manufacturing of Bluffton

Bluffton, OH · ~83 workers · 5 years of OSHA Injury Tracking Application data.

D
Poor Safety Record
5.0
Avg TCR
3.3
Industry avg
0
Fatalities
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The verdict

Diamond Manufacturing of Bluffton runs at 152% of its industry's injury rate - more dangerous than the typical Automotive light bulbs manufacturing workplace, earning a grade D.

Diamond Manufacturing of Bluffton: 5.0 TCR = 152% of Automotive light bulbs manufacturing BLS 3.3 · 5y Form 300A (see methodology below)

Diamond Manufacturing of Bluffton safety composite

Diamond Manufacturing of Bluffton scores strongest on dart rate (safer than 75% of same-industry peers) and weakest on total case rate (tcr) (safer than 25%), blended into one 0-100 breakdown against same-industry peers. A missing measure drops out and redistributes its weight rather than deflating the score. This is a per-dimension breakdown, distinct from the single letter grade above it (which weights TCR alone against the BLS industry benchmark).

D

49/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
F 5.01 per 100 workers

Safer than 25% of industry peers

DART rate
B 0 per 100 workers

Safer than 75% of industry peers

Fatalities
D 0

Safer than 50% of industry peers

Benchmarked live against every credibly-rated employer in the same NAICS industry code in the current OSHA extract (a segment must have at least 8 rated peers to benchmark). Not a legal or compliance determination; PlainSafetyScore's own weighting (TCR 40%, DART 35%, fatalities 25%).

TCR Δ

−8.1

2017→2021

Diamond Manufacturing of Bluffton injury rate improved

Diamond Manufacturing of Bluffton's TCR fell 8.1 from 11.4 in 2017 to 3.3 in 2021. Peak filing year was 2017 at 11.4 TCR. In 2021, DART was 0× this establishment's average TCR (severity share of cases).

2017=11.4 · 2018=8.6 · 2019=0.0 · 2020=1.7 · 2021=3.3

OSHA ITA Form 300A scorecard

Establishment book 335110 · Bluffton, OH ABOVE-IND · SMALL

Grade D · TCR 5.0 · 152% of ind

  • DART 0.0 DART
  • RANK #4/4
  • PHOTO Lamp Plant
  • BOOK 5y book
  • INJ 20 inj
  • SIZE ~83 FTE

Nearest TCR peer: Lamp Plant (0.6 TCR gap)

Read with this employer → · Industry book → · Ohio employers → · Look up another →

Diamond Manufacturing of Bluffton in the TCR neighbourhood

Average Total Case Rate among this establishment and nearest same-industry peers

TCR

What this shows Diamond Manufacturing of Bluffton averages 5.0 TCR (152% of the Automotive light bulbs manufacturing BLS benchmark).

Source U.S. Department of Labor, OSHA Injury Tracking Application (Form 300A) As of 2026-08-25

Diamond Manufacturing of Bluffton TCR series: 2017=11.4 · 2018=8.6 · 2019=0 · 2020=1.7 · 2021=3.3 · BLS 3.3

Where Diamond Manufacturing of Bluffton falls in its industry

16 Automotive light bulbs manufac establishments

Safer than 25% of graded establishments in this industry, whose median TCR is 3.5.

More dangerous than peersSafer than peers

Narrower to Ohio alone (the establishments it most directly competes with for workers and contracts): ranked #4 safest of 4 Automotive light bulbs manufac employers in Ohio.

Diamond Manufacturing of Bluffton (83 employees, TCR 5.0) among 10 same-industry peers, split at the industry median of 64 employees and a TCR of 3.5 2×2 strategic matrix plotting 11 entities by Average employees (X) and Total Case Rate (Y), with a crosshair dividing the plot into four quadrants. Larger & higher-riskSmaller & higher-riskLarger & saferSmaller & safer than peers 0200400600800 02468 Average employees Total Case Rate AFX IncVenture Lighting International, IncOSRAMFirst Light TechnologiesLamp PlantSuperior Quartz Products, Inc.Legacy Lighting : Bucyrus, OHOSRAM HillsboroAlta Advanced Technologies, Inc.Easter-OwensDiamond Manufacturing of Bluffton
Diamond Manufacturing of Bluffton (83 employees, TCR 5.0) among 10 same-industry peers, split at the industry median of 64 employees and a TCR of 3.5

Diamond Manufacturing of Bluffton has more employees than the Automotive light bulbs manufacturing median and a higher injury rate than the industry's median TCR of 3.5. Workforce size and injury rate do not always move together within the same industry -- some of its smaller peers run higher rates than its larger ones, and vice versa.

Year-by-Year Safety Data

Year TCR DART Injuries Illnesses Fatalities
2021 3.3 0.0 2 0 0
2020 1.7 0.0 1 0 0
2019 0.0 0.0 0 0 0
2018 8.6 4.3 7 1 0
2017 11.4 3.4 10 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

335110 · OH · Bluffton

16 Automotive light bulbs manufacturing employers nationwide with a credible TCR · 22,650 rated employers in Ohio with headcount on file · 17 employers in Bluffton, OH · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel Establishment Metric
NAICS-TCR Lamp Plant 4.4 TCR
NAICS-TCR First Light Technologies 5.6 TCR
NAICS-TCR Legacy Lighting : Bucyrus, OH 3.9 TCR
NAICS-TCR Easter-Owens 6.4 TCR
STATE-SIZE A1 Egg Farm 83 FTE
STATE-SIZE Dew Fresh Egg Farm 83 FTE
STATE-SIZE LEP Eggs 83 FTE
STATE-SIZE Central Egg Products 83 FTE
CITY-NEAR GROB Systems, Incorporated 759 FTE
CITY-NEAR SumiRiko Ohio Inc. 568 FTE
CITY-NEAR GROB Bluffton 530 FTE
CITY-NEAR Tower Automotive Operations USA I, LLC - Bluffton 167 FTE
NAT-TCR VPI Sheboygan 5.0 TCR
NAT-TCR Bed Bath and Beyond Elizabeth 5.0 TCR
NAT-TCR 7371-Enphg-Bucknell University 5.0 TCR
NAT-TCR Wegmans Pittsford 025 5.0 TCR
NAT-SIZE Penn Pallet Inc - Saint Marys 83 FTE
NAT-SIZE Lake Pointe Village 83 FTE
NAT-SIZE Processing 83 FTE
NAT-SIZE Arbor Grove Village 83 FTE

Rel codes: NAICS-TCR · STATE-SIZE · CITY-NEAR · NAT-TCR/NAT-SIZE cross-state. Read with this employer →

Data Source: OSHA Injury Tracking Application (ITA), mandatory establishment-level injury/illness reports. Grades compare employer Total Case Rate (TCR) to BLS IIF industry benchmarks. Data covers years reported by this establishment: 2021, 2020, 2019, 2018, 2017. This is publicly available government data - not a legal determination of workplace conditions.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from official public datasets. See our methodology for details.