Plant Light Meter

Estimate the light level in any room and see which houseplants will thrive there — no sensor required.

ESTIMATED LIGHT LEVEL
Medium / bright indirect
Plants that thrive here:
  • Monstera deliciosa
  • Spider plant
  • Rubber plant
  • Dracaena
  • Parlour palm
  • Boston fern
  • Calathea

The shadow test (a 30-second backup)

At midday, hold your hand 30 cm above a sheet of white paper in the spot where the plant will live. The shape of your hand's shadow tells you everything:

FAQ

How do I measure light for houseplants?

The simplest method is the shadow test on a sunny day. Hold your hand 30 cm above a piece of white paper at midday. A sharp, dark shadow means bright light. A soft, defined shadow means medium light. A blurry, faint shadow means low light. No light meter required.

What is bright indirect light?

Bright indirect light is the brightness you experience near a south- or west-facing window without sitting in the actual sunbeam. The room feels bright; you can read comfortably; but no direct sun hits the leaves.

What plants survive low light?

Snake plant, ZZ plant, pothos, philodendron Brasil, cast iron plant, peace lily and Chinese evergreen all tolerate low light, though they grow much faster in brighter conditions.

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Identify any plant, check its health, and get weather-aware care tips — all from your phone. Free on iOS & Android.

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