# Mars Hydro FC-E6500 vs Fluence SPYDR 2i: specs and price compared

A sourced, side-by-side comparison of the Mars Hydro FC-E6500 (Mars Hydro) and Fluence SPYDR 2i (Fluence) among grow lights. Mars Hydro FC-E6500 is the cheaper of the two at $489.99.

## Side by side

| Spec | Mars Hydro FC-E6500 | Fluence SPYDR 2i |
| --- | --- | --- |
| US price | $489.99 | $1335 |
| Brand | Mars Hydro | Fluence |
| Actual power (W) | 730 | 630 |
| Ppf umol s | 2026 | 1700 |
| Efficacy umol j | 2.8 | 2.7 |
| Flower footprint (ft) | 4x4 | 4x4 |
| Spectrum type | white-plus-red | full-spectrum-white |
| Diode count | 3546 | — |
| Dimmable | Yes | Yes |
| Input voltage range | 120-277 | 100-277 |
| Form factor | bar-array | bar-array |
| IP rating | IP65 | — |
| Warranty years | 5 | — |
| Weight (kg) | 10.72 | — |

## Key differences

- Actual power (W): Mars Hydro FC-E6500 730 vs Fluence SPYDR 2i 630
- Ppf umol s: Mars Hydro FC-E6500 2026 vs Fluence SPYDR 2i 1700
- Efficacy umol j: Mars Hydro FC-E6500 2.8 vs Fluence SPYDR 2i 2.7
- Spectrum type: Mars Hydro FC-E6500 white-plus-red vs Fluence SPYDR 2i full-spectrum-white
- Input voltage range: Mars Hydro FC-E6500 120-277 vs Fluence SPYDR 2i 100-277

## Sources

- Mars Hydro FC-E6500: https://wholesale.mars-hydro.com/products/fc-e6500-led/ (wholesale.mars-hydro.com, verified 2026-07-11)
- Fluence SPYDR 2i: https://fluence-led.com/wp-content/uploads/2024/11/FLU-SpecSheet_SPYDR2i47_032024-D-1-1.pdf (fluence-led.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/grow-lights/mars-hydro-fc-e6500-vs-fluence-spydr-2i/
Cite: Per The Front Desk Review, Mars Hydro FC-E6500 ($489.99) vs Fluence SPYDR 2i ($1335) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/grow-lights/mars-hydro-fc-e6500-vs-fluence-spydr-2i/
License: CC BY 4.0.