Setobrick

LEGO part 4278: Light Cover with Internal Bar / Bionicle Barraki Eye with Hole in Bar

Bars, Ladders and Fences7 colours56 sets

LEGO part LEGO part 4278: Light Cover with Internal Bar / Bionicle Barraki Eye with Hole in Bar

Specifications

Reference4278
CategoryBars, Ladders and Fences
MaterialABS plastic
Colours7
Sets56
Listed pieces172
First appearance2022
Latest appearance2026
Element (White)6448949
Most common colourWhite
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-29

LEGO part 4278, Light Cover with Internal Bar / Bionicle Barraki Eye with Hole in Bar, belongs to the Bars, Ladders and Fences category. It exists in 7 colours and appears in 56 sets of our database, from 2022 to 2026, for a total of 172 listed pieces. Its most common colour is White.

Number 4278 identifies the shape and is moulded under the part. Each colour also has its own element ID, the one Pick a Brick uses: in white, it is 6448949.

Part 4278 through the years

The oldest set in our database that contains part 4278 is 4000037 LEGO Factory AGV, released in 2022 in the LEGO Exclusive theme. It is still in use: the most recent set featuring it, 43302 Main Street, U.S.A., dates from 2026.

Its peak year is 2025, with 19 sets containing it. The set with the most copies is 10366 Tropical Aquarium: 40 copies, against an average of 3.1 per set.

It is spread across several themes, led by LEGO Ideas and CUUSOO (11%), City (9%) and Icons (7%). With 56 sets, it ranks no. 1,555 of 2,731 parts in our database and no. 48 of 68 in the Bars, Ladders and Fences category.

Sets containing part 4278, by period

PeriodSets
20221
202314
202411
202519
202611

Colours of part 4278

3 colours appear in only one set: medium lavender (10366 Tropical Aquarium), medium nougat (21370 E.T. the Extra-Terrestrial) and bright light yellow (40858 SpongeBob SquarePants Figure). One of its colours is transparent: opal trans-dark pink.

Colour (element ID)SetsPiecesExample sets
White64489492457603684330240955
Black64489482146421711031710320
Dark Tan64844101022433021150543293
Opal Trans-Dark Pink65769062207564510366
Medium Lavender657690511910366
Medium Nougat66278291721370
Bright Light Yellow66346761140858

Where to buy part 4278

Setopedia shows no prices: they vary by colour, condition and seller. Amazon links are affiliate links.

Search part 4278 on AmazonPick a Brick (lego.com)BrickLink entryRebrickable entry

Sets that include part 4278

Sets ranked by popularity that include at least one part 4278, in any colour.

Related parts

More parts in the Bars, Ladders and Fences category

All parts in the Bars, Ladders and Fences category

Frequently asked questions

How many LEGO sets include part 4278?

Part 4278 (Light Cover with Internal Bar / Bionicle Barraki Eye with Hole in Bar) appears in 56 sets listed on Setopedia, from 2022 to 2026, in any colour.

Which LEGO set contains the most copies of part 4278?

Set 10366 Tropical Aquarium, released in 2025, contains 40 copies, the highest count in our database. On average, a set containing part 4278 has 3.1.

Which colours does LEGO part 4278 come in?

7 colours are listed for part 4278. The most common is White, found in 24 sets.

What is the rarest colour of part 4278?

According to our inventories, it is bright light yellow, found in only 1 set (40858 SpongeBob SquarePants Figure).

What is the element ID of part 4278 in white?

In white, part 4278 has element ID 6448949. Number 4278 is the mould number, the same for every colour.

Is LEGO part 4278 still used in recent sets?

Yes: it appears in sets released in 2026, such as 43302 Main Street, U.S.A..

Where can I buy LEGO part 4278 individually?

Single parts 4278 can be ordered on Pick a Brick (lego.com) in colours currently produced, or on BrickLink for older colours. The part is also included in the sets listed on this page.