Bluetooth flood lights with SimHub
Last updated · SimHub 9.11.22
SimHub supports the cheap Bluetooth flood lights driven by the Happy Lighting app, and there are two requirements. The PC needs Bluetooth Low Energy — either built in or through a dongle — and your phone has to disconnect from the light before the PC can take it. That second one is what breaks it for most people, because the phone reconnects on its own whenever you are near the light with the app installed, and it does so silently. If your lights worked yesterday and do nothing today, close the Happy Lighting app on your phone and turn its Bluetooth off before you assume anything is wrong with SimHub.
These are the £15 wall-wash bars sold under a dozen brand names, all running the same app. They are the least expensive way to get ambient light behind a rig, and the second of the two requirements below is one you can trip over again every single day.
The two requirements
- Bluetooth Low Energy on the PC
- Built into the motherboard or added with a dongle. Classic Bluetooth is not the same thing — a machine that pairs a headset may still lack BLE, and it is worth confirming rather than assuming.
- The phone must disconnect first
- The light accepts one controller. While your phone holds it, the PC cannot have it. This is not configurable.
Why it works, then stops, then works. Your phone reconnects automatically. Walk into the room with the Happy Lighting app installed and it can take the light back without showing you anything. The lights then stop responding to SimHub for no reason you can see. Turn the phone's Bluetooth off, or force-stop the app, before racing.
Which lights these are
The wiki's wording is that Bluetooth flood lights powered by the Happy Lighting app should work. That app drives an enormous number of unbranded and semi-branded LED bars, floods and strips, which is why the compatibility statement is about the app rather than about a manufacturer.
In practice: if the product's listing tells you to download Happy Lighting, it is the family this support was written for. If it tells you to download something else, it is not, and no amount of configuration will change that.
A realistic expectation. Bluetooth is a low-bandwidth link to a device designed for room lighting. This is a good way to get colour on a wall behind your monitors and a poor way to get anything that has to be quick. Judge it as mood lighting that happens to know what is on screen.
If SimHub cannot find the light
- Turn Bluetooth off on every phone in the house that has the app, or force-stop the app. Do this first — it is the answer more often than everything else combined.
- Confirm the PC actually has BLE. Device Manager will list a Bluetooth adapter; the specification matters, and an old adapter may be classic-only.
- Move the dongle to a front port or an extension away from the case. Bluetooth at 2.4 GHz next to a metal PC case and a USB 3 port is a genuinely hostile environment.
- Power-cycle the light so it drops any stale connection it thinks it still has.
USB 3 ports are a known source of 2.4 GHz interference, and a Bluetooth dongle plugged in beside one is a classic self-inflicted problem. If your wireless mouse also stutters, that is the same cause.
Common questions
Which Bluetooth lights work with SimHub?
The ones driven by the Happy Lighting app. The compatibility statement is about the app rather than a brand, because that app controls a very large number of unbranded LED bars and floods sold under many names.
Why do my Bluetooth lights stop responding mid-session?
Your phone has almost certainly reconnected to them. The light accepts one controller at a time, and the app reclaims it silently when the phone is in range. Turn the phone's Bluetooth off before racing.
Do I need a Bluetooth dongle?
Only if the PC has no Bluetooth Low Energy. BLE is the requirement, and it is not the same as classic Bluetooth — some older adapters pair a headset perfectly and cannot do this.
Why is my dongle unreliable?
Often USB 3 interference. USB 3 ports radiate in the 2.4 GHz band that Bluetooth uses, so a dongle plugged in next to one is fighting noise. Move it to a different port or onto a short extension cable away from the case.
Are these good enough for flag warnings?
They are mood lighting that knows what is on screen. Bluetooth to a room-lighting device is not a fast path, so treat these as ambience and put anything you need to react to on hardware in your eyeline.
Sources
Related guides
SimHub is developed independently by Wotever and is not affiliated with OESimRacing. This page was checked against SimHub 9.11.22 on 4 August 2026; where the interface has moved on since, the version stamp tells you how far. More on what SimHub is and what it costs.