# Boslla Bullet B4 4-Mode LED Headlight Bulbs: specs and price

**Price (US):** Not published (BulbFacts cites an estimated street-price range of $110-120 depending on bulb size/seller; no single manufacturer-listed MSRP was found during this research session), as of 2026-08-12.
**Brand:** Boslla
**Deskmark:** Bronze Deskmark — pay-blind category standing 10/100, #8 of 13 in class (independent, computed from sourced data, never for sale).

## Specifications

| Spec | Value |
| --- | --- |
| Price (US) | Not published |
| Brand | Boslla |
| Lumens per set | 8420 |
| Color temp k | 5750 |
| Bulb fitment | Sold across common sizes (bench-tested size not specified); 4 selectable color modes incl. 2950K yellow |
| Wattage (W) | 26.6-28.1 (per bulb, mode-dependent) |
| LED chip type | Philips LED chips |
| Beam pattern | 1-degree rotatable clocking; 4 selectable modes (white / white-yellow blend / yellow / warning-flash) |
| Cooling | Fan-cooled, removable external driver |
| Rated lifespan hrs | — |

## Where it stands

On the spec sheet, its color temp k of 5750 is below the median of the 14, and its lumens per set of 8420 is at the median of the 13.

## Frequently asked questions

**How much does the Boslla Bullet B4 4-Mode LED Headlight Bulbs cost?**

The Boslla Bullet B4 4-Mode LED Headlight Bulbs has no published US price as of 2026-08-12.

**What are the Boslla Bullet B4 4-Mode LED Headlight Bulbs's key specs?**

Boslla Bullet B4 4-Mode LED Headlight Bulbs (Boslla): lumens per set 8420, color temp k 5750, bulb fitment Sold across common sizes (bench-tested size not specified); 4 selectable color modes incl. 2950K yellow, wattage w 26.6-28.1 (per bulb, mode-dependent), led chip type Philips LED chips. Full sourced spec sheet verified 2026-08-12.

Source: https://bulbfacts.com/led-kits/reviews/boslla-bullet-4-mode-led-kit-review.html (bulbfacts.com, accessed 2026-08-12)
Canonical: https://frontdeskreview.com/product/led-headlight-bulbs/boslla-bullet-b4/
License: CC BY 4.0. Price history: https://frontdeskreview.com/data/price-history.jsonl