Key Features
5000 LumensWhen you need to light up a room, not just a small corner, this cordless site light throws up to 5000 lumens across medium-sized work areas. That means fewer shadows, cleaner layout work, and less guesswork at the end of the day. Set It AnywhereIntegrated magnets, wall mounting options, tripod positioning, and a swiveling head make it easy to aim the beam where the work actually is. You spend less time fighting bad light and more time getting the job done. Jobsite ToughThe shock-resistant, scratch-resistant housing is dust-proof and splash-proof to IP54 standards. That matters when the light is riding in the truck, moving room to room, or working outside in less-than-perfect conditions.
Overview
The Festool SYSLITE KBS C Cordless 5000-Lumen Site Light with Bluetooth 18V Airstream 5.0Ah Battery is a portable jobsite lighting solution built for contractors, remodelers, and serious DIY users who need dependable light without chasing extension cords. This is a cordless site light designed for illuminating indoor and outdoor jobsite work areas. Model Number: 578126-577661. If you are working in unfinished rooms, basements, hallways, punch-list spaces, or anywhere power is limited, this light gives you strong, wide coverage from an 18V battery platform.
The big selling point here is output. With up to 5000 lumens and a daylight-like 5000 K color temperature, the beam is bright enough to clearly show surface defects, layout lines, cut marks, and finish details that get missed under weak yellow light. Festool also made the brightness infinitely dimmable, which matters more than it sounds. On a real job, you do not always want maximum output. Sometimes you need full blast for rough construction, and sometimes you want a lower setting for close-in finish work or longer runtime.
The head swivels so you can aim light from floor level up to the ceiling without awkward stacking, balancing, or propping. That makes this site light more useful than a basic flood light that only points one direction. Festool also built in multiple mounting options, including integrated magnets for metal surfaces, the ability to mount to a wall or beam, and tripod positioning. In practice, that means you can get the light off the floor, keep it out of your way, and put illumination exactly where you need it.
For jobsite use, the housing is built to take abuse. It is described as shock-proof, scratch-resistant, dust-proof, and splash-proof with an IP54 rating. That is the right kind of protection for renovation work, service calls, and general construction where tools get bumped, moved, and exposed to dust all day. The compact build and carrying handle also make it easier to move from room to room than larger stand lights.
On the battery side, this light is compatible with Festool 18V battery packs, except Ergo packs. Festool states runtime at the brightest level is about half an hour per amp hour, with up to two hours using a 4.0Ah battery. That gives you a useful baseline for planning work. The included battery package in this variant makes sense for users who want a ready-to-run setup rather than sourcing power separately.
Another practical advantage is beam quality over the recommended 2 to 5 meter work area. That is a sweet spot for interior rooms, punch-list work, cabinet installs, service work, and general inspection tasks. The 72 LED setup is aimed at broad, even coverage rather than a narrow hot spot, so you get better visibility across the space instead of one bright patch and a lot of shadows around it.
If you are a finish carpenter, remodeler, electrician, HVAC tech, painter, or general contractor who regularly works where permanent lighting is poor or nonexistent, this Festool cordless work light solves a real problem. It is especially useful for indoor renovation and service work where portability, fast setup, and accurate lighting matter more than dragging in a full-size tower light. If you mostly need to light a single room or focused work zone and want something that runs on the Festool 18V platform, this is the kind of light that earns its spot in the van.
Light the Room, Not Just the Workbench
This light is built for the kind of spaces where overhead lighting is missing, blocked, or just not good enough. Instead of working in your own shadow, you get broad daylight-style illumination that helps with measuring, fitting, inspecting, and finishing.
- Up to 5000 lumens for medium-sized work areas
- 5000 K light color for a more natural, daylight-like view of the work
- Recommended illumination range of roughly 2 to 5 meters
Put the Beam Where You Need It
A work light is only as good as its placement. Festool gave this one a swiveling body and multiple mounting options so you can get the light off the floor, aim it precisely, and keep your hands free.
- Integrated magnets attach quickly to metal surfaces like scaffolding or steel doors
- Can be mounted on a wall or beam, or positioned on a tripod
- Swiveling lamp body helps cover floor, wall, and ceiling work
Built for Real Jobsite Use
This setup makes sense when extension cords are a pain or power is not nearby. The 18V platform keeps the light mobile, and the housing is built to handle dust, splashes, and everyday knocks in the truck and on site.
- Compatible with Festool 18V battery packs except Ergo packs
- IP54 dust-proof and splash-proof housing
- Runtime at full brightness is about half an hour per amp hour
What’s in the Box
- (1) Festool SYSLITE KBS C cordless site light
- (1) Festool 18V Airstream 5.0Ah battery
Key Specifications
| Light Output | Up to 5000 lumens |
|---|---|
| Light Color | 5000 K |
| Voltage | 18V |
| IP Rating | IP54 |
| LED Count | 72 LEDs |
| Runtime | About 0.5 hour per Ah at full brightness |
| Weight | 5.7 lb |
| Coverage Range | Optimized for 2 to 5 m work areas |
Compatibility
Battery PlatformWorks with Festool 18V battery packs, except Festool Ergo packs. Mounting OptionsCan be fixed magnetically to metal surfaces, mounted to a wall or beam, or positioned on a tripod.
Built For
Remodeling Finish Carpentry General Contracting Electrical HVAC Painting Interior Renovation Punch List Work
Pro Tip
If the floor is getting crowded, stick the light to a steel door frame or scaffold instead of leaving it at ground level. You will get better spread, fewer shadows across the work, and one less thing to kick over.
Tool Nut’s Take
Tool Nut’s Take
Festool SYSLITE KBS C Cordless 5000-Lumen Site Light with Bluetooth 18V Airstream 5.0Ah Battery is the kind of light you actually use
If you work in dark rooms, service spaces, or unfinished interiors, this is a smart cordless lighting setup that gives you strong output, flexible placement, and the toughness to live on a real jobsite.
- Who it’s for: Contractors, remodelers, service pros, and serious DIY users who need reliable portable lighting for room-sized work areas.
- Why it stands out: The combination of 5000-lumen output, daylight-like color, dimming, magnetic mounting, and a swiveling head makes it more useful than a basic flood light.
- Worth knowing: This is built around the Festool 18V system, so it is a better buy if you already run Festool batteries or want a compact premium light rather than a cheap stand light.
Common Questions
- Is this a cordless light? Yes. It runs on Festool 18V battery packs, so you can use it where no outlet is available.
- Can it be used outdoors? Yes. The housing is rated IP54, which means it is dust-proof and splash-proof for tough jobsite conditions.
- Can the brightness be adjusted? Yes. The light output is infinitely dimmable, so you can tune brightness for the task and battery runtime.
- Which batteries fit this light? Festool states it is compatible with all Festool 18V battery packs except Ergo packs.
Reviews
There are no reviews yet.