# SANSI C21GL-C01-20W 20W 4-Head Puck Grow Light

SANSI C21GL-C01-20W is a four-head LED puck grow light rated at 20W, with a full-spectrum listing claim and selectable 4-, 8- or 12-hour timer cycles. Its stick-on or tie-on installation approach suits shelves and cabinets, while AC-adapter power means it needs an outlet nearby.

- [Original product page](https://loonieperks.com/product/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- [View offer](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- Market: CA
- Language: en-CA
- Currency: CAD
- Brand: SANSI
- Model: C21GL-C01-20W
- Price: 54.39 CAD
- Previous price: 67.99 CAD
- Discount: 20%
- Price checked: 2026-11-13T12:31:34.793Z
- Rating: 4.5 / 5
- Reviews: 44

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Four LED heads are listed at 20W total, with the feature text describing four 5W heads.
- Timer choices are 4, 8 or 12 hours on a 24-hour cycle, according to the listing.
- The listing describes a full-spectrum output and gives a 4000 Kelvin colour temperature.
- Manufacturer copy describes adhesive and zip-tie installation for indoor shelves, cabinets and similar locations.

## Pros

- Four separate heads offer placement options around plants on a shelf or cabinet.
- An automatic timer provides three stated daily cycle options without requiring manual switching each day.
- The stated 20W total draws from an AC adapter, making it suitable for a fixed indoor location with nearby power.

## Cons

- The listed operation is non-dimmable, so brightness cannot be adjusted using a dimmer.
- AC-adapter power requires access to an outlet and does not provide cordless placement.

## Specifications

### Identity
- Brand: SANSI
- Model: C21GL-C01-20W
- Light source: LED
- Number of light sources: 4
- Light source wattage: 20 watts
- Colour: White
- Style: Modern
### Lighting and operation
- Colour temperature: 4000 Kelvin
- Timer settings: Auto On/Off Timer \(4Hrs, 8Hrs, 12Hrs\)
- Dimming: Non-dimmable operation
### Power
- Power source: AC \(alternating current\) adapter
- Voltage: 120 volts
### Dimensions and installation
- Mounting type listed: Surface Mount
- Form factor: Round
- Dimensions and weight: 18.39 x 13.49 x 8 cm; 720 g
### Materials
- Material listed: Ceramic Polycarbonate \(PC\)

## Before you buy

- The manufacturer describes a 24-hour timer cycle beginning when set, with the selected 4-, 8- or 12-hour period on. It also claims a 25,000-hour lifespan and broad plant-growth suitability, which are manufacturer claims rather than verified performance.

## In the box

- Zip ties (Included)
- 4-head puck grow light with timer on/off switch and power cord (Included)

## A good fit for

- Indoor growers adding supplemental light to plants arranged on shelves, cabinets or other surfaces near an outlet.
- Buyers who want four light heads and a recurring timer but do not need dimming.

## Less suited to

- Growers who need adjustable brightness or a cordless light.
- Buyers seeking a stand-mounted or independently positioned lamp rather than a surface-installed puck light.

## Customer feedback

Customer feedback reports positive impressions of lighting quality and brightness. That perception may matter for buyers using the four-head, 20W listed light as supplemental indoor illumination, but feedback does not establish measured output or plant-growth results. Aggregate ratings are mostly five-star, with some lower-star ratings, so experiences are not uniformly positive.
- Positive themes: Customer feedback describes the lights as bright and speaks positively about lighting quality.

## Frequently asked questions

### Does this grow light dim?
No. The listing describes it as non-dimmable, so it operates without brightness adjustment.
### What timer settings are listed?
The timer choices are 4, 8 and 12 hours on a 24-hour cycle, starting when the timer is set.
### How does it get power?
The listed power source is an AC adapter, so plan for an outlet within reach.
### Can it be attached to a shelf or cabinet?
The manufacturer describes installation with double-sided tape or zip ties. The listed mounting type is Surface Mount.

## Alternative options

- [Barrina OG09 Puck Grow Light, 36W\(4 x 9W\), 5000K, Timer, 4 Packs, White \| Full Spectrum Plant Light for Indoor Plants, Magnetic & Linkable, 5 Levels Dimmable, Small Grow lamp, Perfect for Plant Shelf](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- [Aokrean Grow Lights for Indoor Plants, Full Spectrum Plant Light with Base \| 48 LEDs Halo Grow Lamp for Small Plants, Base/Soil Insert, 6.5-26in Adjustable,3 Spectra, 3/9/12H Timer, 10 Brightness,3 Pack](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- [Kullsinss Clip-on Plant Lights for Indoor Growing, 171 LEDs 24W Grow Light \| White 3-Head Gooseneck Plant Lamp with 6/12/16H Timer & 5 Dimmable, 6000K\\460nm\\660nm Full Spectrum Grow Light for Seedlings](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- [SANSI 45W LED Grow Light, Full Spectrum, High PPFD, 4-Level Dimmable \| 79-90in Adjustable Stakes, Timer \(4/8/12H\); for Large Tall Plants](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- [Barrina T8 Grow Light for Indoor Plant, Full Spectrum, 4FT 5000K, 4 Packs \| V-Shape Plant Light with Reflector, Linkable, 168W \(4 x 42W\), for Greenhouse and Indoor Seedling Growth, Daylight White](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- [SANSI 30W 3-Head Tripod Grow Light, 500W Equiv, Full Spectrum, Dimmable \| 35-65in Adjustable Stand, Auto On/Off Timer; Energy Efficient Indoor Growing](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- [VOURTM Grow Light, 5000K Full Spectrum Plant Light for Indoor Growing \| 540 LEDs Plant Grow Lights with 3 Color Modes & 9 Dims, Auto Timer 3/9/12H for Seed Starting, Veg & Bloom\(4 Panels\)](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- [Barrina OG09 Puck Grow Light, 36W\(4 x 9W\), 660nm Red LEDs, Timer, 4 Packs \| Full Spectrum Plant Light for Indoor Plants, Magnetic & Linkable, 5 Levels Dimmable, Small Grow lamp, Perfect for Plant Shelf](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- [Inzlume Hanging Grow Lights for Indoor Plants, 3800K Full Spectrum LED \| 18W Hanging Plant Light, 660nm Red Light , Timer 4/9/14H, 16.4FT Cord, Pendant Plant Lamp for Tall Plant, Corner, Plant Shelf](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- [LINGSFIRE Grow Lights for Indoor Plants, 384 LEDs Lights for Shelves with 3/9/12h Auto Timing Ceiling Lamp for Indoor 5 Brightness Levels Puck Grow Lamp for Small Plants, 4 Packs](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- [SANSI 15W Full Spectrum LED Grow Light Bulb, Ceramic, Full Cycle, E26 \| For Hydroponics, Indoor Farming, Greenhouses](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- [SANSI 10W Clip-On LED Grow Light, Full Spectrum, 4-Level Dimmer, White \| Auto On/Off Timer \(3/6/12H\); for Small Plants, 1-Pack](https://loonieperks.com/visit/sansi-c23zw024-10w-clip-on-led-grow-light)

## Add-ons

- [SANSI 10W Full Spectrum LED Grow Light Bulb, 150W Equiv, High PPFD, 3-Pack \| Optical Lens Design, E26 Base; for Seeds & Green](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)
- [SANSI LED Grow Light for Indoor Plants, Full Spectrum, 4-Level Dimming \| Auto On/Off Timer; Plant Grow Lamp for Indoor Growin](https://loonieperks.com/visit/sansi-c21gl-c01-20w-four-head-puck-grow-light)

## Images

![SANSI C21GL-C01-20W 20W 4-Head Puck Grow Light — 1](https://loonieperks.com/i/s2Ip0qUPOPqkU7Gf5bmXvqPtsoURP6JFSemKo4NNUWWrXEmLbnDUyB0qeWx1M4LcfWcl8yb6TVA6m0PrPlV8NR7hTv88bl1-kM73mUutLNWV76JRlpOI1Quv.jpg)

![SANSI C21GL-C01-20W 20W 4-Head Puck Grow Light — 2](https://loonieperks.com/i/trTqjmEXGi-5Xe7GSx7S7FHswQlQ4SB1rhhU9nRxIqFba7H1ADeOMtoDMPbIMaY8dAKR5n-TwkKsxFD_Wwr8GgEWdNBSs5aQuDcKnfYN19XN-0c7LWUFNt1O.jpg)

![SANSI C21GL-C01-20W 20W 4-Head Puck Grow Light — 3](https://loonieperks.com/i/YYIM5QVc3c2nPJ_yvyRzjsqf5jpOx-b6LMLIOm1-6_2w1YZwGXlwHMZl-C8wNYqXTn8IM7TvPpgj4Cy8DS-JU9rO1JwWScZoUF6hyoOXbklIlCNkC15BBIcH.jpg)

![SANSI C21GL-C01-20W 20W 4-Head Puck Grow Light — 4](https://loonieperks.com/i/pUcZo-BKArtp3CzxEreNuvRtlU63asef4wo2yaT96cnwbGWcjSuFDdw8rvUooxv8Ym3xKnpv7g7RzPG3YfISrQxPIvhQrw1P57AjryeRmgwdfzQ4mapn9hvq.jpg)

![SANSI C21GL-C01-20W 20W 4-Head Puck Grow Light — 5](https://loonieperks.com/i/XEtTY6gD4-xpz0vGBOTA0Pw2R0JkhGlPh5NlSG1e29ATM7Abr_kiFUqtsHK1pnvoQ7OdoTz3TxEwX9sLLqL6KOm2bwwFErnIhqw3P6Yq0JGuCm_pyLjjIC97.jpg)

![SANSI C21GL-C01-20W 20W 4-Head Puck Grow Light — 6](https://loonieperks.com/i/cBmdM-r4he6BPjpZ7ka2jUgCYxlYAOw3RbGaol2qkeHVlgA0FxUBcWWk3Eoy_UVfIMb2znwxDoyw_0TqWbcI62mjrWsWRPTgW-i-tyIMF8r7DPvc4uR_Vz-Z.jpg)

![SANSI C21GL-C01-20W 20W 4-Head Puck Grow Light — 7](https://loonieperks.com/i/5CxtiA55oY4kyMV2xNScy31T6HuCvtcpADH6yP_LpqA-oPkSQBKyCyrSadkaodtLr4gub6JYpnhAtCtsctJC1WAnkf5nKQWdzkym-RiMt8hlRODluPnsV0qI.jpg)