The Spider Farmer SF series is a line of dimmable, full spectrum LED board lights made for home growers, with models sized for small tents up to large 5×5 spaces. On paper the lights offer good efficiency for the price class, simple passive cooling and an easy dimmer, which makes them a common pick for first and second grows. The main things to check are which size fits your tent, which diode and driver version you are getting, and whether a board style light suits your space better than a bar style one. Pair the right light with genetics from our indoor seeds collection. This guide is for adults 21 and older growing where home cultivation is legal.

This is a spec based review. We compared the maker’s published product pages and manuals with what home growers need. We did not run our own test grow, and specs, included parts and model names change by version and region, so check the manufacturer’s current listing before you buy. Kind Seed Co is not affiliated with this brand and this post is not sponsored.

The SF series lineup

Here is how the main SF models were described on the maker’s site on Oct 29 2026. Wattage is the listed power draw. Coverage is the maker’s suggested core flowering area. Treat these as a guide and check the current listing.

Model	Listed power	Listed core coverage	Good for
SF1000	About 100 W	2×2 ft	One or two small plants, autoflowers
SF2000	About 200 W	2×4 ft	A narrow tent or closet grow
SF4000	About 450 W	4×4 ft	The most common home tent size
SF7000	About 650 W	5×5 ft	Larger tents and experienced growers

Spider Farmer also sells other lines, such as bar style lights. This review covers only the board style SF series.

Key features

Full spectrum light

SF lights are white, full spectrum boards that look natural to the eye, which makes it easier to spot leaf problems than under purple lights. Some versions add red diodes to the mix. Check the spec sheet for the version you are buying.

Efficiency

Efficiency tells you how much usable light a fixture makes for each watt of power. The maker lists efficiency for each model, and the figures were in a solid range for board lights at the time of writing. Real results depend on the light’s distance, your tent and your plants. Our guide on grow light electricity cost explains how to estimate your power bill.

Dimming

Each SF light has a dimmer, so you can run it low for seedlings and young plants and turn it up in flower. Some newer versions can link to a controller. Dimming is useful in small tents, where full power can be too strong. See cannabis seedling light schedule.

Passive cooling

The boards use a heat sink and no built in fan, so they run quietly. You still need an exhaust fan to move heat out of the tent. Read grow light heat management.

Diodes and drivers

Spider Farmer has used well known diode and driver brands on many versions, but parts can change by version and region. If a specific diode or driver brand matters to you, confirm it on the listing before you buy.

What we like on paper

• Clear model sizes that match common tent sizes
• Full spectrum white light that makes plant checks easy
• Built in dimmer for seedlings, veg and flower
• Quiet, fanless design
• Solid listed efficiency for the price class
• Widely used, so many growers share settings and tips online

What to consider

• Board lights concentrate light in the center more than wide bar lights, so corners can get less light in larger tents
• The SF1000 is small and suits only a small space
• Specs and parts vary by version, so compare the exact listing
• Heat still builds in a closed tent, so plan exhaust and airflow
• Bar style lights from many brands spread light more evenly in big spaces, if that matters to you

Board vs bar style lights

Board lights like the SF series are compact and simple to hang, and often cost less per watt. Bar lights spread diodes over a wider frame, which can give more even coverage in 4×4 and larger tents and better airflow around the light. Both can grow good plants. Compare designs in quantum board vs bar LED and our guide to choose the right LED lights for your cannabis grow.

Which SF model should you choose

• Small tent or closet: SF1000 for one or two compact plants
• 2×4 tent: SF2000, sized for a narrow space
• 4×4 tent: SF4000, the most common choice for home growers
• 5×5 tent: SF7000 for larger spaces

Match the light to the tent, not the other way around. A light that is too strong for a small tent makes heat and can stress plants, while a weak light in a big tent leaves the corners dim. Remember your state’s plant limit when planning the space.

Setup tips

1. Hang the light from the tent’s top bars with rope ratchets so you can adjust height.
2. Start with the maker’s distance chart and adjust based on how plants respond. See LED light distance for cannabis.
3. Run the dimmer low for seedlings and raise it slowly.
4. Use a reliable timer. See grow light timers.
5. Plug into a grounded outlet or power strip, keep the driver dry, and keep cords off the floor. Read grow tent fire safety.
6. Increase intensity gradually in flower. See when to increase light intensity in flowering.

Caring for the light

Dust can build up on the diodes and heat sink over time. Unplug the light, let it cool and wipe it gently with a dry, soft cloth between grows. Check the power cord and driver for damage. Keep water and nutrient spray away from the fixture. Simple care helps the light run cool and last longer.

Spider Farmer kits

Spider Farmer also bundles SF lights with tents, fans and filters. Our companion review of the Spider Farmer grow tent kit covers those bundles in this series. If you already own a tent, buying the light alone gives you more flexibility.

Strains that suit SF lights

• SF1000 or SF2000: Northern Lights Auto or Blueberry Auto for compact plants
• SF4000 or SF7000: White Widow or Critical Mass for photoperiod plants you can train

Frequently asked questions

Is the Spider Farmer SF series good for beginners?

On paper, yes. The models are sized for common tents, the dimmer is simple, and many growers share settings online. You still need to manage climate, water and feeding.

Which Spider Farmer light do I need for a 4×4 tent?

The maker lists the SF4000 for a 4×4 core flowering area. Check the current listing for coverage and power draw.

Do SF lights need a fan?

The lights have no built in fan, but your tent still needs an exhaust fan to remove heat and humidity.

Are the diodes the same on every version?

Not always. Parts can vary by version and region, so confirm the diode and driver brands on the listing.

Did you test these lights?

No. This is a spec based review built from the maker’s published product pages. Check the manufacturer’s current listing before you buy.

The bottom line

The Spider Farmer SF series offers simple, dimmable board lights sized for common home tents. Pick the model that fits your space, confirm the version you are buying, and plan your exhaust. Then start strong with seeds from our indoor seeds collection, or browse the full Kind Seed Co shop. Kind Seed Co sells only to adults 21 and older. Always follow the home grow laws where you live.