Start from the wall and work backwards
A datasheet is written to be read in the order the product was designed, which is rarely the order you need it. Read an outdoor logo projector light sheet backwards: start from the image you want on the wall, then the distance, then the optics, then the light source. The headline wattage is the last thing to look at and the first thing most people compare.
Lumens, watts and what reaches the wall
Treat the lumen figure as a rough sorting tool and nothing more. It ignores the lens, the gobo transmission and the colour filter, any of which can take a third of the output. For an outdoor logo projector light in the 50–250 W class, ask instead for measured image lux at a stated distance — a supplier who has that number has actually tested the unit.
| Figure | What it measures | How much to trust it |
|---|---|---|
| Lumens | Total light leaving the lamp | Rough sorting tool — ignores lens and gobo losses |
| Lux at the wall | Light arriving on the surface | The number that matters, rarely quoted |
| Watts | Power drawn from the supply | Tells you running cost, not brightness |
The two numbers that must be quoted together
Throw distance without image width is meaningless, and plenty of sheets quote only one. an outdoor logo projector light that throws 35 m might give you a 1 m logo at that distance or a 6 m one, depending on the lens — a difference that decides whether the install works. Always ask for the pair: distance and the resulting image size.
| Throw | Typical image width | Practical note |
|---|---|---|
| Short, around 6 m | 0.5 – 1.5 m | Bright and easy — most indoor work |
| Mid, around 35 m | 1.5 – 3 m | Where lens quality starts to matter |
| Long, beyond 35 m | 3 m and up | Contrast fails before reach does |
Gobo size, image area and resolution
Gobo size is quoted as an outer diameter, but what matters is the image area — the part the light actually passes through. A 53 mm gobo may only have a 45 mm image circle, and artwork sized to the outer diameter gets cropped. For an outdoor logo projector light, ask for both figures before you commission artwork, because a file drawn for the wrong one is wasted.
IP rating and electrical data
IP67 is the number to check for anything outdoors, but read what it covers. The first digit is solid ingress, the second is liquid. IP67 on an outdoor logo projector light means dust-tight and protected against water jets, and it says nothing about the bracket, the gland or the connector, which are the parts that actually fail. Ask whether the rating covers the whole assembly or just the housing.
Questions worth asking the supplier
The most revealing question is about failure. Ask what the most common warranty claim on this outdoor logo projector light is and how it is resolved. A supplier who answers honestly is worth more than one with a slightly better spec sheet.
