# Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance vs GTR Lighting Ultra Series 2 LED Headlight Bulbs (H7): specs and price compared

A sourced, side-by-side comparison of the Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance (Diode Dynamics) and GTR Lighting Ultra Series 2 LED Headlight Bulbs (H7) (GTR Lighting) among led headlight bulbs.

## Side by side

| Spec | Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance | GTR Lighting Ultra Series 2 LED Headlight Bulbs (H7) |
| --- | --- | --- |
| US price | $80 | not published |
| Brand | Diode Dynamics | GTR Lighting |
| Lumens per set | — | 9150 |
| Color temp k | 6000 | 5450 |
| Bulb fitment | H9, 9005 (HB3), 9006 (HB4) only — never offered in H11 | H7 (bench-tested unit); sold across other common sizes |
| Wattage (W) | — | 38.2 (per bulb) |
| LED chip type | — | Elec-Tech LED chips |
| Beam pattern | Manufacturer-claimed 30-70% more light in the critical hotspot vs. halogen (ray-trace-optimized optics) | — |
| Cooling | Active — Sunon bearingless microfan, direct-solder copper core board, thermally-modeled zinc casting | Fan-cooled |
| Rated lifespan hrs | — | 5000 |

## Key differences

- Color temp k: Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance 6000 vs GTR Lighting Ultra Series 2 LED Headlight Bulbs (H7) 5450
- Bulb fitment: Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance H9, 9005 (HB3), 9006 (HB4) only — never offered in H11 vs GTR Lighting Ultra Series 2 LED Headlight Bulbs (H7) H7 (bench-tested unit); sold across other common sizes
- Cooling: Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance Active — Sunon bearingless microfan, direct-solder copper core board, thermally-modeled zinc casting vs GTR Lighting Ultra Series 2 LED Headlight Bulbs (H7) Fan-cooled

## Sources

- Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance: https://www.diodedynamics.com/sl1-led-bulbs-pair.html (diodedynamics.com, verified 2026-08-12)
- GTR Lighting Ultra Series 2 LED Headlight Bulbs (H7): https://bulbfacts.com/led-kits/reviews/gtr-lighting-ultra-series-2-led-kit-review.html (bulbfacts.com, verified 2026-08-12)

Canonical: https://frontdeskreview.com/gear/led-headlight-bulbs/diode-dynamics-sl1-vs-gtr-lighting-ultra-2/
Cite: Per The Front Desk Review, Diode Dynamics SL1 LED Headlight Bulbs (Pair) — Discontinued Clearance ($80) vs GTR Lighting Ultra Series 2 LED Headlight Bulbs (H7) (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/led-headlight-bulbs/diode-dynamics-sl1-vs-gtr-lighting-ultra-2/
License: CC BY 4.0.