Four hours of light is a budget, not a sentence

Every plant tag in America is written for a greenhouse in Florida. “Bright indirect light” means something specific there and almost nothing in a shaded Florida room, where a north window delivers maybe 200 foot-candles on a good afternoon and none at all by four o'clock.

Measure it once

You don't need a meter, though we sell one. Hold your hand a foot above the spot at noon on a clear day. A hard-edged shadow is direct sun — that's a south or west window, and it will happily run a tomato. A soft shadow with definable edges is bright indirect: pothos, philodendron, most ferns. If the shadow is a vague smudge, you have low light, and the honest options are a pothos, a ZZ plant, or a lamp.

The plant does not care what the tag said. It cares how many photons landed on it this week.

What a fixture actually buys you

A 20-watt full-spectrum bar hung eight inches over a seed tray adds roughly the equivalent of three hours of window sun, for only a modest amount per month in electricity. That is the entire trick. It is not a grow room, it is a lamp on a timer, and it is the single cheapest upgrade in this catalog.

The timer matters more than the lamp

Plants integrate light over the day; a bright four hours does less than a moderate fourteen. Set the timer for sixteen hours for seedlings, twelve for mature foliage, and leave it alone. The most common failure we see isn't a weak light. It's a good light that somebody remembers to switch on three days a week.

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