Grow lights are the gateway equipment of indoor growing. They are also where most beginners overspend, overspec, or buy something that does not match their actual room. The marketing reads as if you need a 600W professional fixture to grow herbs on a kitchen counter, which is roughly five times more light than the herbs need and ten times more than the electricity bill will gracefully accept.

This guide walks through what a small apartment actually needs, what to ignore in the marketing, and how to set up a useful indoor light station for under $100.

Setup time: 1 hourBudget: $40-$200Year-round equipment

How much light you actually need

For most kitchen-scale indoor growing (herbs, lettuce, microgreens), 20-30 watts of modern LED lighting per square foot is enough. For fruiting plants (chilli, small tomato), 30-50W per square foot. Anything over that is professional-scale and not necessary for home use.

Types of grow light

LED strip lights

The cheapest entry point. T5 or T8-style LED strips designed for plant growth, $20-$40 each. Excellent for shelves of seedlings or herbs.

LED panel lights

The most common consumer option. 20-50W panels, $40-$120. Good for single trays or small shelf areas.

Bulb-and-clamp LED

A single LED grow bulb in a clamp lamp from a hardware store. Cheapest of all, $15-$30. Excellent for one or two pots on a desk.

Full-spectrum quantum boards

Professional grade. Overkill for most home use. Useful only if you are growing fruiting plants in a closed cabinet.

Reading the spec sheet honestly

Watch out for confusing marketing claims. The ones that matter:

  • Actual wattage drawn (not ‘equivalent’ wattage).
  • PPFD or μmol/m²/s rating at a stated distance.
  • Spectrum: full-spectrum or 3000K+5000K mix is fine for general growing.
  • Heat dissipation: Look for aluminium heat sinks; cheap lights overheat.

Ignore:

  • Inflated ‘equivalent’ wattages.
  • Number of LED diodes (largely meaningless on its own).
  • Vague ‘full spectrum’ claims without proof.
  • Lifetime hour claims; LEDs almost always outlast their drivers.

How far above the plants

Most home LED lights work at 20-40 cm above the canopy. Too close and you scorch leaves; too far and the plants stretch.

Watch the plants. If they look leggy or pale, the light is too far or too weak. If they look stunted or scorched, too close or too strong.

How long to run the light

  • Salad greens, herbs: 14-16 hours a day.
  • Fruiting plants in vegetative growth: 14-16 hours.
  • Fruiting plants in flowering: 12 hours on, 12 off.
  • Microgreens: 12-14 hours.

A simple plug-in timer ($10) automates this and dramatically improves results.

A simple home setup we recommend

  1. One LED panel rated 30-40W actual draw, around $60.
  2. An adjustable hanging frame or a metal wire-shelf rack ($30).
  3. A digital timer ($10).
  4. One seed-starting tray with drainage and dome ($15).

Total cost roughly $100-$120 for a station that produces salad greens, herbs and seedlings year-round.

Further reading

Two authoritative resources we recommend if you want to go deeper on this topic:

Frequently asked questions

A 30W cool-white LED bulb provides enough light for herbs and seedlings if placed close. Plant-specific LEDs are more efficient and often better balanced, but ordinary household LEDs work in a pinch.
A 30W light running 14 hours a day for a month uses about 12 kWh, or roughly $2-$4 in electricity, depending on local rates.
Full-spectrum LEDs are not harmful for short exposure, but staring at any bright light is uncomfortable. Pink-purple lights (only red+blue) cause more eye strain than full-spectrum white.
No. Plants need a dark period for respiration. 14-16 hours of light, 8-10 hours of dark, is the norm.
Bright by window light is usually not as bright as you think. Even south-facing windows may give only 4-6 hours of true direct sun. For productive indoor growing, supplemental lighting is usually worth it.
Jay Sharma
Written by

Jay Sharma

Jay Sharma edits Farmora Living. He grew up around a working kitchen garden and has spent the last several years testing equipment, growing methods, and small-space food setups in his own courtyard and rooftop plot before writing about them here. His pieces lean on what a first or second year of practical growing actually looks like, on tool reviews grounded in real seasons of use, and on the small shortcuts and honest mistakes that only surface after you have done the work yourself.

105 guides published Contributor since 2021 Updated regularly

Continue reading