What Is 0-10V Lighting Control?
0-10V is a simple analog control signal that tells an LED driver how bright to shine, commonly used in office and commercial lighting. Here's a plain-language rundown of how it works and where its limits are.
How 0-10V Works
A separate control pair
A low-voltage control pair runs from the dimmer or controller to the LED driver, physically separate from the mains lighting wiring.
Voltage sets the brightness
The voltage on the control pair, within the 0-10V range, directly sets the output brightness -- higher voltage, brighter light; lower, dimmer.
0V or 1V at the bottom -- it matters
A compliant 0-10V driver can switch fully off at 0V through the control line itself. A 1-10V system bottoms out at 1V -- the light stays low, but NOT off.
One control pair, one zone
Every driver wired to the same control pair receives the same voltage and dims together -- there's no individual address for any single driver.
What to know about 0-10V
voltage = brightness
Higher voltage on the control pair means brighter light. Simple, but with no addressing.
0-10V vs 1-10V -- not always what's on the box
Many drivers marketed as '0-10V' actually behave like 1-10V -- dimming to a low floor, not fully off. Always check the driver datasheet, don't assume.
Source and sink -- polarity has to match
Historically (from fluorescent ballast wiring practice), the control pair has two current-direction conventions. Dimmer and driver need a compatible type and correct polarity, or dimming won't work right.
One zone, not per-bulb control
0-10V is analog and not individually addressable -- no per-driver address, no digital bus, no status feedback from the driver. Multiple independent zones mean multiple separate control pairs, decided at install time.
Not DALI, and that's not a bad thing
DALI is a digital, individually addressable protocol with feedback. 0-10V is a simpler, cheaper analog option with no addressing -- the right choice depends on whether you need per-fixture control or just zone-level dimming.
Why it's still so common
0-10V still shows up widely in office panel lights, recessed fixtures, and industrial lighting -- because it's cheap, simple to install, and robust.
What you need for a 0-10V setup
The basic pieces to understand before a DIY 0-10V installation.
- {'t': 'A 0-10V/1-10V dimmer or controller', 'd': 'A device with a low-voltage control output that generates a 0-10V range voltage for the driver.'}
- {'t': 'A separate control cable', 'd': 'A low-voltage pair physically separate from the mains lighting cable -- not the same wire.'}
- {'t': 'A compatible LED driver', 'd': 'Check the driver datasheet -- does it actually reach 0V (full off), or does it only dim to a low floor like 1-10V?'}
- {'t': 'A separate switch or relay, if needed', 'd': "If the driver or system is 1-10V only, you'll need an extra mains switch or relay to turn the light fully off."}
- {'t': 'Correct source/sink matching', 'd': "Check that the dimmer's and driver's current-direction type and polarity match -- otherwise dimming won't work correctly."}
Frequently asked questions
Are 0-10V and DALI the same thing?
No. DALI is a digital, individually addressable protocol with status feedback for every fixture. 0-10V is a simpler analog voltage that dims every driver on the same control pair together as one zone -- no addressing. The choice depends on whether you need per-fixture control (DALI) or zone-level dimming is enough (0-10V).
What exactly is the difference between 0-10V and 1-10V?
0-10V can switch a compliant driver fully off at 0V through the control line itself. 1-10V's usable range bottoms out at 1V -- the light stays low but NOT at zero, so you need a separate mains switch or relay to turn it fully off.
Can I control each bulb individually with 0-10V?
No. Every driver wired to the same control pair gets the same voltage and dims together as one zone. If you need multiple independent zones, each needs its own separate control pair, decided at install time.
Why won't my '0-10V' driver switch fully off?
Many drivers sold as '0-10V' actually behave like 1-10V -- dimming to a low floor, not off. Check the driver datasheet rather than trusting the label on the box.
How many drivers can I connect to one control pair?
That depends entirely on the dimmer's rated sink/source current and each driver's control-input current draw -- there's no fixed number without checking datasheets. Always check both the dimmer's and driver's specs.
Thinking about 0-10V dimming for your project?
Browse 0-10V/1-10V compatible dimmers and LED drivers in the shop -- and check the datasheets before you plan your zones.