Bowling ball core · Brunswick

Brunswick Light Bulb Core

The core inside the Brunswick Rhino line

A symmetric core with later rev-up, more length and low flare, built for dry to medium oil. 7 of the 11 balls with this core are in stock at BowlersMart.

  • Symmetric
  • RG 2.524
  • Diff 0.030
Brunswick Light Bulb symmetric core shape inside the ball

Specs

RG AT 15 LB

2.524

Later rev-up, more length

Revs soonerRevs later

68% of the reactive and urethane balls we stock have a lower RG.

DIFFERENTIAL AT 15 LB

0.030

Low flare

Less flareMore flare

8% of the reactive and urethane balls we stock have a lower differential.

MASS BIAS AT 15 LB

None

Symmetric core

Symmetric cores have no mass bias marker to place when drilling.

RG How soon the ball revs up.Differential How much the ball can flare.Mass bias How asymmetric the core is.
Brunswick Light Bulb Core specs by ball weight (reference ball: Brunswick Rhino)
Weight RG DifferentialDiff Mass biasMB
16 lb 2.511 0.030 None
15 lbUsed on this page 2.524 0.030 None
14 lb 2.540 0.030 None
13 lb 2.558 0.030 None
12 lb 2.579 0.030 None
11 lb 2.769 0.002 None
10 lb 2.800 0.002 None

Source: Brunswick published specs, as listed on the Rhino product page. RG and differential change with ball weight; use the row for the weight you throw. The highlighted 15 lb row is the one used on this page.

Balls with the Brunswick Light Bulb Core

7 of the 11 balls with the Brunswick Light Bulb Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.

Pearl covers

Pearl covers go longer and turn harder at the end, best on medium oil.

Brunswick Rhino Red Black Gold Pearl Bowling Ball

Brunswick Rhino Red Black Gold Pearl

Brunswick R-16 Pearl Reactive

Dry to medium oil

Sale price $94.95 Regular price $169.95In stock
Brunswick Rhino Magenta Purple Navy Bowling Ball

Brunswick Rhino Magenta Purple Navy

Brunswick R-16 Pearl Reactive

Dry to medium oil

Sale price $94.95 Regular price $169.95In stock
Brunswick Rhino Cobalt Teal Aqua Pearl Bowling Ball

Brunswick Rhino Cobalt Teal Aqua Pearl

Brunswick R-16 Pearl Reactive

Dry to medium oil

Sale price $94.95 Regular price $169.95In stock
Brunswick Rhino Purple Pink Berry Bowling Ball

Brunswick Rhino Purple Pink Berry

Brunswick R-16 Pearl Reactive

Dry to medium oil

Sale price $94.95 Regular price $169.95In stock
Brunswick Rhino Purple Black Bowling Ball

Brunswick Rhino Purple Black

Brunswick R-16 Pearl Reactive

Dry to medium oil

Sale price $94.95 Regular price $169.95In stock
Brunswick Rhino Carbon Lime Silver Bowling Ball

Brunswick Rhino Carbon Lime Silver

Brunswick R-16 Pearl Reactive

Dry to medium oil

Sale price $94.95 Regular price $169.95In stock
Brunswick Rhino Blue Grey Silver Bowling Ball

Brunswick Rhino Blue Grey Silver

Brunswick R-16 Pearl Reactive

Dry to medium oil

Sale price $94.95 Regular price $169.95In stock
Show 4 balls no longer available at BowlersMart
More bowling balls with the Brunswick Light Bulb Core
Ball Cover First seen
Brunswick Rhino Metallic Blue Black Bowling Ball Brunswick R-16 Pearl Reactive May 2017
Brunswick Rhino Charcoal Silver Violet Bowling Ball Brunswick R-16 Pearl Reactive April 2016
Brunswick Rhino Black Blue Silver Pearl Bowling Ball Brunswick R-16 Pearl Reactive April 2016
Brunswick Rhino Purple Pink White Pearl Bowling Ball Brunswick R-16 Pearl Reactive April 2016

Shop the 7 available balls with this core

Where the Brunswick Light Bulb sits

Each dot is a core in balls we stock. Cores close together roll alike; the cover and layout decide the rest.

Storm Element Tour A.I. Core, RG 2.470, diff 0.035DV8 Larceny Core, RG 2.471, diff 0.028DV8 Renegade Core, RG 2.499, diff 0.040Track I-Core Gen4, RG 2.480, diff 0.053Brunswick Vintage Light Bulb Low RG Core, RG 2.568, diff 0.032Brunswick Dual Centric Core, RG 2.509, diff 0.047Ebonite Big Time Core, RG 2.508, diff 0.054Hammer Stacked LED Core, RG 2.545, diff 0.047Hammer Vindicator Core, RG 2.474, diff 0.053Radical Vexed Variant Asymmetric Core, RG 2.490, diff 0.045Radical Modified Intel Symmetric Core, RG 2.483, diff 0.032Motiv Affliction V2 Core, RG 2.480, diff 0.055900 Global Conduit A.I. Core, RG 2.590, diff 0.050Roto Grip GEM A.I. Core, RG 2.490, diff 0.057Hammer Obsession Tour Core, RG 2.469, diff 0.034Hammer Super Offset Core, RG 2.524, diff 0.053Hammer Gas Mask Core, RG 2.500, diff 0.058Ebonite Turbo Core, RG 2.517, diff 0.040Ebonite Centrex Symmetrical Mass Bias Core, RG 2.466, diff 0.056Motiv Detonator Core, RG 2.470, diff 0.055Storm Solarion A.I. Core, RG 2.480, diff 0.054SWAG Watcher Symmetric Core, RG 2.510, diff 0.048SWAG Dragon Asymmetric Core, RG 2.490, diff 0.050SWAG Executioner Asymmetric Core, RG 2.500, diff 0.051Motiv Predator V2 Core, RG 2.470, diff 0.054Storm C3 Centripetal Control Core, RG 2.490, diff 0.029Roto Grip Rondure MaxD Core, RG 2.500, diff 0.058Hammer Vibe Core, RG 2.510, diff 0.042Hammer Aftermath Core, RG 2.520, diff 0.052Brunswick Alert Core, RG 2.478, diff 0.037Brunswick Rampart Core, RG 2.502, diff 0.051DV8 Collision Core, RG 2.462, diff 0.052Track MC2 Asym Core, RG 2.473, diff 0.046Radical Evil Eye Symmetric Core, RG 2.495, diff 0.046Ebonite Iron Fist V2 Core, RG 2.473, diff 0.053Radical No Doubt Symmetric Core, RG 2.485, diff 0.051Storm Surge Core, RG 2.580, diff 0.024Roto Grip Hyped UP Core, RG 2.500, diff 0.042Roto Grip Morph-Wing Core, RG 2.510, diff 0.051Motiv Sigma Core, RG 2.470, diff 0.047900 Global Blast A.I. Core, RG 2.470, diff 0.055900 Global Strobe A.I. Core, RG 2.510, diff 0.052Radical Guru Core, RG 2.503, diff 0.044Track I-CORE 3.0, RG 2.486, diff 0.056DV8 Unholy Core, RG 2.504, diff 0.051Brunswick Infinity Core, RG 2.521, diff 0.051Storm Catalyst A.I. Core, RG 2.480, diff 0.053Hammer Gauntlet Core, RG 2.501, diff 0.050Hammer Raw Hammer Core, RG 2.537, diff 0.038Storm Atmos A.I. Core, RG 2.530, diff 0.042Storm Booster Core, RG 2.540, diff 0.046Track Shuttle Core, RG 2.480, diff 0.040Radical Sneak Attack Core, RG 2.544, diff 0.036Motiv Gear Core, RG 2.480, diff 0.034Hammer Huntsman Core, RG 2.470, diff 0.050Hammer Super LED Core, RG 2.632, diff 0.034Ebonite Enhanced V2 Core, RG 2.480, diff 0.048DV8 Dualistic Core, RG 2.496, diff 0.045Radical Vexed Asymmetric Core, RG 2.498, diff 0.036Motiv Quadfire Core, RG 2.550, diff 0.043Track Stealth Core, RG 2.482, diff 0.056Brunswick Tiered Hexagon Core, RG 2.540, diff 0.045Columbia 300 Piranha Core, RG 2.554, diff 0.043Storm Torsion A.I. Core, RG 2.470, diff 0.050Storm Element Max A.I. Core, RG 2.470, diff 0.055Storm Radius Core, RG 2.610, diff 0.020Roto Grip Rondure Tour X Core, RG 2.480, diff 0.034SWAG Unreal Core, RG 2.510, diff 0.047SWAG Serpent Asymmetric Core, RG 2.510, diff 0.048Radical Torpedo Asymmetric Core, RG 2.480, diff 0.052Motiv Overload Core, RG 2.480, diff 0.050DV8 Duality Core, RG 2.480, diff 0.036Hammer Spheroid Core, RG 2.480, diff 0.048Radical Outer Limits Asymmetric Core, RG 2.499, diff 0.051Motiv Apex Predator Core, RG 2.520, diff 0.055Brunswick Danger Zone Core, RG 2.501, diff 0.048Storm RAD-TQ Core, RG 2.560, diff 0.051Storm Velocity Core, RG 2.480, diff 0.051Hammer Modified LED Core, RG 2.586, diff 0.027Epic Spark Core, RG 2.540, diff 0.049Motiv Hadron Dual Density Core, RG 2.500, diff 0.045Track Criterion ID Core, RG 2.496, diff 0.047Brunswick Zone Asymmetric Core, RG 2.478, diff 0.048Ebonite Entity Core, RG 2.515, diff 0.052Roto Grip Rocker A.I. Core, RG 2.480, diff 0.050Motiv Flux Core, RG 2.570, diff 0.015DV8 Mantra Core, RG 2.498, diff 0.047Hammer Gas Mask Low Diff Core, RG 2.500, diff 0.034Roto Grip RST A.I. Core, RG 2.520, diff 0.055Motiv Impulse V2 Core, RG 2.550, diff 0.050SWAG APX V1 Core, RG 2.500, diff 0.042SWAG Judge Core, RG 2.490, diff 0.052900 Global Magna A.I. Core, RG 2.490, diff 0.044Columbia 300 Pulse PowerCOR Core, RG 2.468, diff 0.045KR Strikeforce Launch Core, RG 2.530, diff 0.047900 Global Ellipse Asymmetric A.I. Core, RG 2.480, diff 0.050Motiv Halogen Core, RG 2.550, diff 0.037Storm C3 A.I. Core, RG 2.480, diff 0.031Motiv Gear APG Core, RG 2.470, diff 0.036Radical Snapshot Symmetric Core, RG 2.523, diff 0.050Hammer High Rev Offset Core, RG 2.489, diff 0.053Hammer Huntsman Tour Core, RG 2.472, diff 0.036Hammer LED Core, RG 2.650, diff 0.015Storm Inverted Fe2 Core, RG 2.570, diff 0.046Storm Capacitor Core, RG 2.570, diff 0.022SWAG Craze Core (pictured: SWAG Craze Hybrid Bowling Ball)1Roto Grip Hustle Core (pictured: Roto Grip Hustle M+M Bowling Ball)2SWAG Insanity Symmetric Core (pictured: SWAG Insanity Pearl Bowling Ball)3Motiv Excel Core (pictured: Motiv Frenzy Blue Teal Pearl Bowling Ball)4SWAG Fusion Core (pictured: SWAG Fusion Bowling Ball)5Brunswick Fury Core (pictured: Brunswick Fury Emerald Black Bowling Ball)6Brunswick Light Bulb Core (pictured: Brunswick Rhino Red Black Gold Pearl Bowling Ball)EARLY REV-UPMID-LANELATER REV-UPHIGH FLAREMEDIUMLOW FLARE2.442.482.522.562.602.642.680.0100.0200.0300.0400.0500.060RG at 15 lbDifferential at 15 lb← Revs up soonerRevs up later →More flare ↑Less flare ↓

Nearest cores, zoomed in

Hover or tap a dot for that core’s numbers. Click a dot to open its page. Drag to move around when zoomed in. The same RG and differential do not guarantee the same ball motion.

This core 1 Nearest cores Other cores

Nearest cores to the Brunswick Light Bulb Core
Core Brand Shape RG Diff vs this core
SWAG Craze Hybrid Bowling Ball1SWAG Craze CorePictured: SWAG Craze Hybrid
 SWAG Symmetric 2.520 0.030 RG −0.004 · Diff 0.000
Roto Grip Hustle M+M Bowling Ball2Roto Grip Hustle CorePictured: Roto Grip Hustle M+M
 Roto Grip Symmetric 2.530 0.030 RG +0.006 · Diff 0.000
SWAG Insanity Pearl Bowling Ball3SWAG Insanity Symmetric CorePictured: SWAG Insanity Pearl
 SWAG Symmetric 2.520 0.034 RG −0.004 · Diff +0.004
Motiv Frenzy Blue Teal Pearl Bowling Ball4Motiv Excel CorePictured: Motiv Frenzy Blue Teal Pearl
 Motiv Symmetric 2.550 0.030 RG +0.026 · Diff 0.000
SWAG Fusion Bowling Ball5SWAG Fusion CorePictured: SWAG Fusion
 SWAG Symmetric 2.540 0.036 RG +0.016 · Diff +0.006
Brunswick Fury Emerald Black Bowling Ball6Brunswick Fury CorePictured: Brunswick Fury Emerald Black
 Brunswick Symmetric 2.524 0.038 RG 0.000 · Diff +0.008

Matches use 15 lb RG and differential.

Drilling and tools

Brunswick drill sheetsLayout guides for symmetric and asymmetric ballsDual angle converterTurn a pin to PAP layout into a dual angle layout

Turn on JavaScript to compare with your ball.Balls with the Brunswick Light Bulb Core7 of the 11 balls with the Brunswick Light Bulb Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.Pearl coversPearl covers go longer and turn harder at the end, best on medium oil.

From Brunswick’s description

Questions bowlers ask

What is the RG of the Brunswick Light Bulb Core?

At 15 lb the Brunswick Light Bulb Core has an RG of 2.524. It ranges from 2.511 to 2.800 across the listed weights.

What is the 14 lb RG of the Brunswick Light Bulb Core?

At 14 lb the RG is 2.540.

What is the differential of the Brunswick Light Bulb Core?

At 15 lb the differential is 0.030. This is a symmetric core, so mass bias is not applicable.

Which bowling balls use the Brunswick Light Bulb Core?

Brunswick Rhino Red Black Gold Pearl Bowling Ball, Brunswick Rhino Magenta Purple Navy Bowling Ball, Brunswick Rhino Cobalt Teal Aqua Pearl Bowling Ball, Brunswick Rhino Purple Pink Berry Bowling Ball, Brunswick Rhino Purple Black Bowling Ball. 7 are in stock now.

How do the Brunswick Light Bulb Core specs change by weight?

At 16 lb: RG 2.511, differential 0.030. At 12 lb: RG 2.579, differential 0.030.

How does the Brunswick Light Bulb Core compare with my ball?

Type the ball you throw into the Compare with your ball box on this page. It shows the RG and differential side by side and saves your bag for every core page.

Sources and method

Specs. Brunswick published specs, as listed on the Rhino product page, as published by the manufacturer.

Baseline. The baseline is 212 in-stock, published reactive and urethane balls. Plastic and polyester covers, 2-piece, 3-piece and pancake cores, missing covers and missing RG or differential values are excluded.

Percentiles. Percentiles are the share of baseline balls with a strictly lower or higher value; ties are not counted.

Nearest cores. Nearest cores are ranked by distance on standardized 15 lb RG and differential, with the same symmetric or asymmetric shape preferred among near ties (distance bands of 0.1).

Mass bias. Mass bias is compared among asymmetric balls with numeric mass bias only.

Updated. Catalog and page updated 2026-10-16.

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