Some links on this page are to Amazon UK. If you buy through them, Plant Light Guide may earn a commission. This does not change the price you pay. Affiliate disclosure.
Grow lights for UK houseplants, a spec-based shortlist
This is a shortlist by stated specification and by which bit of furniture the fitting suits. It is not a test. We have not grown plants under these lamps, and we have not measured them.
We haven't tested this kit. Specifications are as the maker states them (checked 13 November 2026).
Prices move. The links go to the Amazon UK product page so you can see the current price and whether that size is in stock. Specifications below are the wording on those pages on 13 November 2026.
Bulbs for one plant
| Listing | What the maker states | Use it for |
|---|---|---|
| SANSI 15 W E27 | 15 W, E27, 4000 K, PPF 27 µmol/s, 60° beam. Mount 18–24 inches up. Not in an enclosed shade. | One houseplant in an open lamp. |
| SANSI 24 W E27 | 24 W, E27, PPF 40 µmol/s, 60° beam. Maker cites a PPFD around 177 µmol/m²/s at 1 ft. Not in an enclosed shade. | A slightly brighter single bulb. |
| SANSI 40 W E27 | 40 W, E27, average PPF 67 µmol/s. Maker says at least 30 cm from the plant and quotes a high PPFD at 1 ft. | A larger plant or a very dull corner, with the extra distance. |
"300 W equivalent" and similar lines on these bulbs are comparisons, not the draw. You pay for 15, 24 or 40 W. See what listings exaggerate and E27 and B22 fittings.
A clip for a desk
The SANSI 10 W gooseneck is stated as 10 W, 4000 K, with a 3, 6 or 12 hour timer and a pot clip. The maker says it is incompatible with smart plugs and external timers, and that the timer must be reset after a power cut. Coverage is one plant. A shelf needs a bar.
Bars for a shelf or cabinet
| Listing | What the maker states | Use it for |
|---|---|---|
| Barrina T5 2 ft magnetic, 4-pack | 4 × 10 W (40 W for the pack), 5000 K, full spectrum, linkable up to 16, clips and magnetic strips. | A shelf around 60 cm, or two shelves if you split the pack. |
| Barrina T5 1 ft magnetic, 4-pack | 4 × 5 W (20 W for the pack), linkable up to 16. | A short cabinet shelf. Magnetic only helps on steel. |
Stay inside the daisy-chain limit printed for the version you buy. Heat, cables and rented walls are in shelves and cabinets. 5000 K is a cool white. If the shelf faces the sofa and you want a softer lamp, a 4000 K bulb in an open fitting is the easier thing to look at. The colour argument is in full spectrum and blurple.
A panel, if the bench is bigger than a shelf
The Spider Farmer SF600 listing states 72 W, a slim panel, and a maximum coverage of 60 cm × 120 cm. The same page offers an SF300-UK size option. This page does not repeat a wattage for that smaller size, because the bullets above describe the 72 W model. Treat coverage as the maker's claim and hang to their chart.
That is already more light than a single houseplant needs, and the listing's language leans towards tents and benches. If you are actually buying a tent, a filter and an extractor, stop here and use Hydroponics Guide. For a living-room shelf, prefer the bar or the bulb.
How to choose without a test
- Match the format to the furniture. The format guide and the shelf tool do that from your measurements.
- Read watts, voltage (220–240 V) and the distance chart. Ignore equivalent watts.
- Prefer a white spectrum in any room you sit in.
- Put the lamp on a timer and leave a dark period.
- Recheck the cost with your own unit rate. The cap arithmetic is in running cost.