# HIKARI Ultra LED Headlight Conversion Kit vs Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance: specs and price compared

A sourced, side-by-side comparison of the HIKARI Ultra LED Headlight Conversion Kit (HIKARI) and Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance (Diode Dynamics) among led headlight bulbs.

## Side by side

| Spec | HIKARI Ultra LED Headlight Conversion Kit | Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance |
| --- | --- | --- |
| US price | not published | $80 |
| Brand | HIKARI | Diode Dynamics |
| Lumens per set | 5470 | — |
| Color temp k | 6450 | 6000 |
| Bulb fitment | Sold in multiple common sizes incl. H11/H8/H9; the specific size independently bench-tested is not stated | H9, 9005 (HB3), 9006 (HB4) only — never offered in H11 |
| Wattage (W) | 23.1 (per bulb, independently measured) | — |
| LED chip type | Philips Lumileds Luxeon Z ES (6 per bulb, 3 per side) | — |
| Beam pattern | 5-star low-beam pattern rating (BulbFacts independent test) | Manufacturer-claimed 30-70% more light in the critical hotspot vs. halogen (ray-trace-optimized optics) |
| Cooling | Fan-cooled, 32mm heatsink, external removable driver | Active — Sunon bearingless microfan, direct-solder copper core board, thermally-modeled zinc casting |
| Rated lifespan hrs | 60000 | — |

## Key differences

- Color temp k: HIKARI Ultra LED Headlight Conversion Kit 6450 vs Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance 6000
- Bulb fitment: HIKARI Ultra LED Headlight Conversion Kit Sold in multiple common sizes incl. H11/H8/H9; the specific size independently bench-tested is not stated vs Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance H9, 9005 (HB3), 9006 (HB4) only — never offered in H11
- Beam pattern: HIKARI Ultra LED Headlight Conversion Kit 5-star low-beam pattern rating (BulbFacts independent test) vs Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance Manufacturer-claimed 30-70% more light in the critical hotspot vs. halogen (ray-trace-optimized optics)
- Cooling: HIKARI Ultra LED Headlight Conversion Kit Fan-cooled, 32mm heatsink, external removable driver vs Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance Active — Sunon bearingless microfan, direct-solder copper core board, thermally-modeled zinc casting

## Sources

- HIKARI Ultra LED Headlight Conversion Kit: https://bulbfacts.com/led-kits/reviews/hikari-ultra-led-kit-review.html (bulbfacts.com, verified 2026-08-12)
- Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance: https://www.diodedynamics.com/sl1-led-bulbs-pair.html (diodedynamics.com, verified 2026-08-12)

Canonical: https://frontdeskreview.com/gear/led-headlight-bulbs/hikari-ultra-vs-diode-dynamics-sl1/
Cite: Per The Front Desk Review, HIKARI Ultra LED Headlight Conversion Kit (not published) vs Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance ($80) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/led-headlight-bulbs/hikari-ultra-vs-diode-dynamics-sl1/
License: CC BY 4.0.