Quick answer: Give a money tree bright, indirect light: Missouri Botanical Garden recommends bright light indoors, while NC State Extension warns that direct sunlight can scorch its leaves. (Missouri Botanical Garden, NC State Extension)
This guide concerns lighting for the plant described by those sources as Pachira aquatica. It separates indoor placement advice from outdoor shade classifications, explains how to compare light readings, and shows what a lighting calculation can actually tell you. The sources do not establish a species-specific indoor foot-candle target, so the numerical example below is a planning exercise, not a growth prescription.
Where should you put a money tree indoors?
Choose a bright position with indirect light rather than prescribing a window direction or a fixed distance from the glass. NC State Extension says money trees prefer indirect sunlight or a mixture of sun and shade, and identifies leaf scorch as a possible result of direct sun. That supports checking the actual exposure where the leaves sit. (NC State Extension)
According to Missouri Botanical Garden, houseplants perform best with bright light and moderate, even moisture. Its advice does not supply a universal window offset, so do not treat a particular compass direction as proof that a position is suitable. (Missouri Botanical Garden)
Use this placement checklist:
- Look at the intended leaf position and identify whether direct sun reaches it.
- Compare the brightness of alternative positions with a meter rather than relying only on how bright the room looks.
- If considering artificial light, measure the intended plant position with that light switched on.
- Keep the distinction between a measured reading and a verified plant requirement: the former does not establish the latter.
What does “bright indirect light” mean in numbers?
Use foot-candles or lux to describe the location, but name the reference scale. According to UF/IFAS, terms such as bright indirect light are vague; its low, medium and high categories are generalizations. Its midday scale differs from Missouri Extension's houseplant scale, as the table shows. (UF/IFAS, Missouri Extension)
| General light category | According to UF/IFAS, at midday | According to Missouri Extension |
|---|---|---|
| Low | 25–100 foot-candles (source) | 50–250 foot-candles (source) |
| Medium | 100–500 foot-candles (source) | 250–1,000 foot-candles (source) |
| High | 500–1,000 foot-candles (source) | At least 1,000 foot-candles (source) |
These are general houseplant categories, not alternative prescriptions for a money tree. Missouri Extension's cited plant list does not include Pachira, and neither scale establishes the minimum reading that will keep this particular plant growing well.
For measurement, UF/IFAS says a handheld digital meter reading lux or foot-candles and accurate to one foot-candle is adequate for houseplants; phone apps provide approximate readings. Use the same measurement position when comparing candidate locations so you are comparing the places the plant would actually occupy. (UF/IFAS)
How can you use the foot-candle calculator?
Use the foot-candle calculator to convert units and explore the light needed over an assumed area. Select its custom target rather than treating an office or warehouse preset as plant advice. The LEDask calculator hub provides the site's other lighting tools if you also need to plan lighting elsewhere in the room.
A foot-candle is one lumen per square foot. The calculator uses lux = foot-candles × 10.764 and fixture lumens = (foot-candles × area) ÷ (coefficient of utilization × light loss factor). The utilization and loss factors distinguish light emitted by a fixture from light available over the calculation area.
Worked example with assumed inputs
Assumed inputs: a rectangular plant area 2 ft long × 2 ft wide, a uniform 500-foot-candle calculation target, and utilization and light loss factors both set to 1 to isolate the arithmetic before losses. The chosen target is the upper edge of UF/IFAS's medium band, not a verified money-tree requirement. (UF/IFAS)
- Area = length × width = 2 × 2 = 4 ft².
- Light reaching that area = target × area = 500 × 4 = 2,000 lumens.
- Combined assumed factors = utilization × light loss factor = 1 × 1 = 1.
- Calculated fixture output = (500 × 4) ÷ (1 × 1) = 2,000 ÷ 1 = 2,000 lumens.
- Lux equivalent = 500 × 10.764 = 5,382 lux.
The equal surface and fixture lumen totals result from the assumed absence of losses. They do not mean that any lamp with that rated output delivers the assumed reading across a plant. This calculation describes an idealized surface; it does not verify leaf coverage or establish an appropriate grow-light wattage.
Can you supplement window light with an LED grow light?
Artificial lighting is an option, but the available timing and distance figures are general houseplant guidance. According to Missouri Extension, plants receiving no outdoor light should receive 16–18 hours of artificial light daily; 12–14 hours may be adequate when some additional light is available. The same publication places most plant tips 6–12 inches from the source. These are not Pachira-specific instructions or a universal clearance for every LED fixture. (Missouri Extension)
Before choosing a lamp, decide whether it will supplement window light or provide all the light. Then compare its stated coverage and mounting instructions with the space above the plant, and measure at the intended leaf position. Use the fixture's instructions for its installation distance; the general extension range cannot validate a particular product.
The supplied sources do not establish a money-tree-specific LED wattage. Consequently, a wattage recommendation would add precision without evidence. The useful calculation here is the relationship between an assumed illuminated area and a chosen reading, followed by checking what the installed light actually delivers.
Does outdoor shade advice apply indoors?
Outdoor shade classifications do not supply indoor light targets. According to NC State's landscape listing, partial shade means direct sunlight for part of the day, 2–6 hours. That is an outdoor cultural-condition category, not an instruction to give an indoor money tree that duration of direct sun. (NC State Extension)
According to Missouri Botanical Garden, outdoor plants tolerate close to full shade. Its separate recommendation for houseplants is bright light, so the outdoor tolerance statement is not evidence that a dim indoor corner is suitable. (Missouri Botanical Garden)
FAQ
Can a money tree live in low light?
The cited sources do not establish an indoor minimum for Pachira. According to Missouri Botanical Garden, houseplants perform best in bright light; outdoor shade tolerance should not be read as an indoor low-light guarantee. (Missouri Botanical Garden)
Can a money tree get direct sunlight?
NC State describes a preference for indirect sunlight or mixed sun and shade, while warning that direct sunlight can scorch leaves. For indoor placement, choose bright indirect exposure rather than deliberately seeking sustained direct sun. (NC State Extension)
Can I measure its light with my phone?
Yes, as an approximation: UF/IFAS says phone apps provide approximate light readings. It recommends a handheld digital meter accurate to one foot-candle as sufficient for houseplant measurements. (UF/IFAS)
How long should a supplemental light run?
According to Missouri Extension, general houseplant guidance is 12–14 hours daily with some additional light, or 16–18 hours without outdoor light. Those ranges are not a tested money-tree-specific schedule. (Missouri Extension)
Is there an exact lux target for money trees?
No species-specific lux target was established by the supplied sources. Lux can express a measured location or an assumed calculation target, but converting units does not turn a general houseplant category into a money-tree requirement.
Jack Shi
Founder & editor, LEDaskJack Shi builds and writes LEDask, an independent LED-lighting tools project operated by clooms. He designs the calculators, checks their formulas and reference values against published engineering data, and writes the guides across the site.
