How we research

We do not test products hands-on. We do not hang the lights, run the fans or meter anything ourselves, and no page on this site says otherwise. Every guide and review is built from three kinds of evidence, and each page lists exactly which sources it used.

1. Manufacturer specifications

We read the brand’s own product page, manual or spec sheet, and record the figures as the manufacturer states them: wattage, PPF and efficacy for lights, CFM, static pressure and rated noise for fans, canvas and pole specs for tents, accuracy and calibration for meters. We label these as manufacturer figures. They are claims, not verified facts.

When a brand publishes two different numbers for the same thing (for example, a product page and a manual that disagree, or a current listing that differs from an older one), we show both and say so. We do not pick the flattering one.

2. Independent measurements, when someone has published them

Some reviewers and hobbyist labs publish their own measurements: PAR maps with average PPFD, wall-power draw, or side-by-side fan comparisons. When one exists for the product, we cite it by name, link to it and give the date of the test. We also say what it does not cover: an older hardware revision, a single unit, a single hanging height. If no independent measurement exists, the page says that rather than filling the gap.

We prefer measurements that state their method: instrument, test area, hanging height and power draw. A manufacturer’s own PAR map is still a manufacturer figure, and we label it that way.

3. Aggregated owner feedback

We read owner reviews, forum threads and Q&A on retailer and brand pages to find recurring patterns: a fan that stays quiet at mid speed, a connector that fails, a kit that ships without something people expected. We report patterns, not single anecdotes, and we do not quote star averages from stores. Owner feedback is the weakest of the three kinds of evidence, so it never overrides a published measurement.

What we never do

• No invented numbers. If we can’t source a spec, price or measurement, we leave it out.
• No star ratings. A score would suggest hands-on testing we have not done. We give a written research verdict instead, and our structured data carries no rating.
• No prices on the page. Prices change daily. “Check price” links go to the seller’s current listing.
• No paid placement. We earn affiliate commissions on some links (see our affiliate disclosure). Brands cannot pay to be included or ranked.
• No fake reviews or testimonials, consistent with the FTC rule on consumer reviews (16 CFR Part 465).

How picks are chosen

For each category we start from the requirement of the space (coverage, airflow, size), then compare the products that meet it on published evidence: independent measurements first, manufacturer specifications second, owner-reported reliability and support third. Warranty length comes straight from the brand’s published warranty terms. Where a pick depends on a figure only the manufacturer has published, the page says so.

Our calculators (grow light and fan CFM) use standard published formulas, shown on each tool, so you can check the math yourself.

Who does the work

Pages are written by the GrowRighteous Editorial Team. We use AI tools to help gather sources and draft, and every byline says so. Every figure on a page is drawn from, and cited to, a source linked at the bottom of that page, so you can check it against the original. Each page shows when it was last updated.

Corrections

Spotted an error or an outdated figure? Report it and we will correct the page and note the change. PLACEHOLDER: brand-domain email for error reports.