Buying a solar flood light usually starts the wrong way round — people pick a wattage first and hope it covers the yard. Work the other way: measure the space, then match it to a model. This guide gives you the numbers.
Start with the area, not the watt
Wattage on solar lights is a marketing label more than an electrical one. What actually determines brightness is the LED count, the efficiency of the 5054 quad-core chips, and how much energy the battery can store. The practical shortcut is coverage: how many square metres one unit lights to a usable level.
- 50-80 m2 — doorway, shop front, small courtyard. 100W.
- 80-100 m2 — single driveway, back garden, farm entrance. 200W.
- 100-130 m2 — workshop apron, compound, small parking bay. 300W.
- 130-160 m2 — construction yard, loading zone. 400W.
- 160-200 m2 — parking lot, sports court, storage site. 500W.
Mounting height changes everything
The same light mounted at 2.5 m and at 5 m produces very different results. Higher means wider spread but lower intensity on the ground. For a wall-mounted flood light, 3-4 m is the sweet spot; for a pole-mounted street light, 4-6 m. If you must go higher, buy one size up.
Battery capacity is the runtime budget
A 10,000mAh pack runs a 100W-class light for 10-12 hours. A 30,000mAh pack does the same for a 500W-class body. If your site has long rainy seasons, size the battery up rather than the LED — a bigger battery gives you margin on cloudy weeks.
Coverage comparison
| Model | LEDs | Battery | Coverage | Best for |
|---|---|---|---|---|
| 100W | 76 | 10,000mAh | 50-80 m2 | Doorways, shop fronts |
| 200W | 112 | 15,000mAh | 80-100 m2 | Driveways, backyards |
| 300W | 168 | 20,000mAh | 100-130 m2 | Workshops, compounds |
| 400W | 224 | 25,000mAh | 130-160 m2 | Construction yards |
| 500W | 280 | 30,000mAh | 160-200 m2 | Parking lots, courts |
Three mistakes we see all the time
- One big light instead of two smaller ones. Two units at opposite corners remove shadows; one bright unit creates harsh black corners.
- Panel in the shade. Check the sun path before you drill. A panel under an eave or behind a tree will never charge fully.
- Buying on price alone. Cheap units often list a huge “wattage” with a tiny battery — bright for two hours, dark by midnight.
Not sure yet?
Send us the length and width of the area plus the mounting height you have available. We will tell you which model — and honestly, sometimes the answer is two 200W units rather than one 500W.
Frequently asked questions
Is a higher wattage always brighter?
Only within the same product family. Build quality, LED chip count and battery capacity matter just as much. Compare coverage figures and battery size rather than the wattage label alone.
Can I use one 500W instead of three 200W units?
For an open area, yes. For a yard with corners or obstacles, several smaller units give more even light and fewer dark spots.
How high should I mount a solar flood light?
3-4 m for wall mounting and 4-6 m for poles. Going higher spreads the light wider but reduces ground brightness, so consider one size larger.
Still not sure? Tell us the area you want to light and we will recommend a model and mounting height — free, usually answered the same day. WhatsApp +86 186 7539 5280 or email fangyuan12530@Hotmail.com.
Get a Quote for Your Project
Tell us the area you want to light and we will recommend a model and mounting height — free, usually answered the same day.