Mars Hydro TS 1000 vs ViparSpectra P1000
Two fixtures aimed at the same buyer at similar prices. The comparison is short, because only one of them can be compared.
By Scooter M. — An enthusiast who's genuinely into this. I read the manuals, compile the published specs, and do the math. No lab coat.
Published · How we pick
Photographs on this site are licensed stock and are illustrative of the fixture type. We do not own the units we write about.
How this page is funded: the buy links here are Amazon Associates links, and we earn a commission on qualifying purchases at no extra cost to you. We have not been paid to feature anything on this page, we accept no free product, and commission plays no part in the ranking. Full disclosure.
We have not tested these units. Everything below comes from the manufacturer’s own published specifications, or from arithmetic we have shown our working for. Where a figure is not published, we say so instead of estimating one. Read the method.
Quick picks
Efficacy is photons out per joule in. Where a manufacturer publishes it we quote theirs; where they publish photon output and wattage but not efficacy, we divide and label it as ours; where they publish neither, the cell says so rather than guessing. Tap a row for the full write-up.
| # | Product | Best for | Efficacy | Price |
|---|---|---|---|---|
| 1 |  Mars Hydro TS 1000 The most photons of anything on this list, and one of only three fixtures here that publishes both PPF and efficacy so the claim can be checked against itself. | Numbers you can use | 2.3 umol/J | |
| 2 |  ViparSpectra P1000 Genuinely useful hardware — dimmer, daisy chain to 20 units, no fan — wrapped in a product page that publishes no photon data at all. | Daisy chain and silence | Not published |
The reasoning
These two turn up against each other constantly, and most comparisons of them are longer than they need to be. Here is the short version: one of these fixtures publishes what it does, and the other does not. Everything else follows from that.
Side by side, on published figures only
| Mars Hydro TS 1000 | ViparSpectra P1000 | |
|---|---|---|
| Rated power | 150 W ±5% at 100–277 V AC | 100 W |
| Photon flux (PPF) | 343 µmol/s | Not published |
| Efficacy | 2.3 µmol/J | Not published |
| PPFD | Not published | Not published |
| Coverage | 2.5 × 2.5 ft vegetative, 2.3 × 2.3 ft flowering | 2.5 × 2.5 ft vegetative at 16 in, 2 × 2 ft flowering at 10 in |
| Spectrum | 660–665 nm, 730–740 nm, 3000 K, 5000 K | 660 nm, 3000 K, 5000 K, 730 nm far red |
| Dimming | Yes, 0–100% knob | Yes, plus daisy chain to 20 fixtures |
| Dimensions | 406 × 326 × 50 mm | Not published |
| Diodes | Bridgelux | Not published |
What you can compute for one and not the other
Coverage: 343 µmol/s over its stated 2.5 × 2.5 ft (0.581 m²) = 590 at perfect uniformity, about 472 µmol/m²/s at 0.8.
Area at a seedling-appropriate 250 µmol/m²/s: 343 ÷ 250 × 0.8 = 1.097 m² = 11.8 sq ft.
Consistency check: 343 ÷ 150 = 2.29 µmol/J, matching the published 2.3.
The P1000, computed: nothing. There is no photon figure to divide, so none of the three calculations above can be performed.
Wattage is published, so running cost can be computed. Coverage, light level and efficiency cannot, because no photon figure exists to start from.
Where ViparSpectra genuinely wins
Two real advantages, and neither is about light:
- Daisy chain to 20 fixtures. For a multi-shelf build this is a substantial convenience — one plug, one timer, twenty lights. Mars Hydro publishes no equivalent.
- Coverage stated with a distance. “2.5 × 2.5 ft at 16 inches” is a more useful claim than a bare footprint, because it is at least conditional on something. Mars Hydro states footprints with no distance attached.
There is also the 50 W difference in draw, which at 14 hours a day is about $3.86 a month — real, but not decisive.
The HPS claim
ViparSpectra describes the P1000 as comparable to a 250 W HPS. That is a marketing comparison with no photon figure on either side, so it cannot be checked. We go through it properly in LED versus HPS running cost. Mars Hydro makes no equivalent claim, which is to its credit.
The verdict
Mars Hydro TS 1000, unless the daisy chain specifically solves a problem you have. Not because we know it performs better — we have tested neither — but because it publishes enough for you to work out whether it suits your space before you spend anything, and the P1000 does not.
That is a preference for disclosure over an unknown, and it is the same preference that runs through this entire site. If the P1000’s daisy-chaining is worth more to you than the ability to compute your coverage, that is a defensible trade — just make it deliberately.
Every pick in full
Mars Hydro TS 1000
LED panelNumbers you can use
The most photons of anything on this list, and one of only three fixtures here that publishes both PPF and efficacy so the claim can be checked against itself.
What Mars Hydro publishes
- Power draw
- 150 W +/-5% at 100-277 V AC (source)
- PPF (photon output)
- 343 umol/s (source)
- Efficacy
- 2.3 umol/J (source)
- Stated coverage
- 2.5 x 2.5 ft vegetative, 2.3 x 2.3 ft flowering (source)
- Spectrum
- 660-665 nm, 730-740 nm, 3000 K, 5000 K (source)
- Diodes
- Bridgelux (source)
- Dimming
- Yes, 0-100% dimmer knob (source)
- Dimensions
- 406 x 326 x 50 mm (source)
Our arithmetic
- Average PPFD across its stated 2.5 x 2.5 ft vegetative footprint: about 470 umol/m2/s
2.5 ft x 2.5 ft = 6.25 sq ft = 0.581 m2. 343 umol/s divided by 0.581 m2 = 590 umol/m2/s at perfect uniformity; applying a 0.8 uniformity factor gives about 472 umol/m2/s average. - Electricity used at 14 hours a day for 30 days: 63.0 kWh a month
150 W x 14 h x 30 d / 1000 = 63.0 kWh.
Who should skip it
Skip it if you are lighting a bookshelf. 343 umol/s concentrated into a 2.5 ft square is far more light than a monstera wants, and you pay 150 W to deliver it.
ViparSpectra P1000
LED panelDaisy chain and silence
Genuinely useful hardware — dimmer, daisy chain to 20 units, no fan — wrapped in a product page that publishes no photon data at all.
What ViparSpectra publishes
- Power draw
- 100 W (described as comparable to a 250 W HPS) (source)
- Stated coverage
- 2.5 x 2.5 ft vegetative at 16 inches, 2 x 2 ft flowering at 10 inches (source)
- Spectrum
- 660 nm red, 3000 K and 5000 K white, 730 nm far red (source)
- Dimming
- Yes, plus daisy chain up to 20 fixtures (source)
What ViparSpectra does not publish
- PPF in umol/s
- Photon efficacy in umol/J
- PPFD at any stated distance
- Fixture dimensions and rated lifespan
Who should skip it
Skip it if you want to compute coverage before you buy. With no published PPF and no published efficacy there is nothing to compute with, and we will not invent a figure to fill the gap.
Questions people actually ask
+Is Mars Hydro or ViparSpectra better?
+Is the ViparSpectra P1000 a bad light?
+Which uses less electricity?
+Which covers a bigger area?
Sources
- Mars Hydro — TS 1000 published specification table — consulted September 2, 2026
- ViparSpectra — P1000 product page — consulted September 2, 2026
- University of Minnesota Extension — Lighting for indoor plants and starting seeds — consulted September 2, 2026
- US Energy Information Administration — Electric Power Monthly, Table 5.3 (US residential average, June 2026) — consulted September 2, 2026
Read next
Reviews
Mars Hydro TS 1000
343 µmol/s published at 150 W. The most photons here, and the numbers are checkable.
Reviews
ViparSpectra P1000
Useful features, zero published photon data. What you can and cannot know before buying.
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The Best LED Grow Light Panels
The 100 W panel class compared on published output, efficacy and internal consistency.
Running Cost
LED vs HPS Running Cost
What an LED panel actually saves against the HPS lamp it claims to replace.
Where this sits
This page belongs to Fixture Reviews and Roundups. Every figure on it is either quoted from a named published source or derived in view — the full method is on our methodology page, and how the site is funded is on the affiliate disclosure.