If you've been exhibiting for more than a decade, you remember halogen arm lights. They were bright, they were warm, and they got hot enough to burn your hand if you touched the bulb. The trade show industry has almost entirely switched to LED — but the reasons go beyond just heat and energy savings.
Here's a direct comparison of LED vs. halogen for trade show applications, and what the differences actually mean for your booth setup and budget.
Heat Output
Halogen: A 50W halogen MR16 bulb converts roughly 90% of its energy into heat and only 10% into visible light. After 30 minutes of operation, the bulb surface reaches 200–300°C. This creates real problems at trade shows: graphics placed too close to halogen lights can warp or discolor over a multi-day show. Venue fire marshals at many convention centers now restrict or prohibit halogen lighting entirely.
LED: A 16W LED fixture producing equivalent brightness runs at 40–60°C at the housing surface — warm to the touch but not dangerous. No risk of graphic damage, no fire marshal issues, no venue restrictions.
Energy Consumption
Halogen: A typical halogen trade show arm light uses 50W per fixture. Three lights for a 10×10 booth = 150W. Over a 3-day show running 10 hours per day, that's 4.5 kWh — and many venues charge for electricity by consumption.
LED: A 16W LED fixture producing more lumens than a 50W halogen uses 68% less power. Three lights = 48W. Same 3-day show = 1.44 kWh. The electricity cost difference alone can offset part of the fixture cost over a show season.
Brightness and Light Quality
This is where the comparison gets more nuanced.
Halogen: Halogen lights have a naturally high CRI (close to 100) because they produce a continuous spectrum of light similar to sunlight. Colors look accurate and vivid under halogen. This was the main reason exhibitors tolerated the heat and energy cost for so long.
LED: Early LED lights had poor CRI (often 70–80), which is why some exhibitors who switched early were disappointed. Modern LED fixtures rated CRI ≥ 90 match or exceed halogen color quality for practical trade show purposes. The key is buying the right spec — not all LEDs are equal.
Lifespan and Replacement Cost
Halogen: A halogen MR16 bulb lasts approximately 2,000 hours. For an exhibitor doing 10 shows per year at 30 hours per show, that's 300 hours per year — meaning bulb replacement every 6–7 years. But halogen bulbs are sensitive to vibration and handling, so real-world lifespan in a trade show environment (packed, shipped, unpacked repeatedly) is often much shorter.
LED: A quality LED fixture is rated for 50,000 hours. At 300 hours per year of show use, that's 166 years of theoretical lifespan. In practice, the fixture will be obsolete long before the LEDs fail. No bulb replacements, no spare bulb inventory to manage.
Color Temperature Options
Halogen: Halogen produces a fixed warm white light, typically around 2700–3000K. You can't change it. If your brand needs neutral or cool white light, halogen isn't an option.
LED: Available across the full color temperature range — 2800K through 6800K. You choose the CCT that matches your brand and products. Some fixtures offer tunable white (dual CCT) for on-site adjustment.
Portability and Weight
Halogen: Halogen arm lights are typically heavier due to the transformer required to drive the bulb. The transformer also generates heat, adding to the overall thermal load in a packed shipping case.
LED: LED drivers are compact and lightweight. A modern LED arm light typically weighs 30–40% less than an equivalent halogen fixture, which matters when you're shipping 10–20 lights to a show.
Side-by-Side Summary
| Factor | Halogen | LED (CRI ≥ 90) |
|---|---|---|
| Heat output | Very high (200–300°C bulb) | Low (40–60°C housing) |
| Power consumption | 50W typical | 16–25W typical |
| CRI | ~100 (natural) | ≥90 (engineered) |
| Lifespan | ~2,000 hours | ~50,000 hours |
| Color temperature options | Fixed ~2700K | 2800K–6800K, tunable |
| Venue restrictions | Increasingly restricted | No restrictions |
| Bulb replacement | Required periodically | Not required |
Frequently Asked Questions
Are there any situations where halogen is still better than LED for trade shows?
Rarely. The only remaining argument for halogen is the natural CRI of ~100 vs. LED's engineered CRI of 90–95. For fine art exhibitions or gemstone displays where absolute color accuracy is critical, some specialists still prefer halogen. For the vast majority of trade show applications, CRI 90 LED is indistinguishable from halogen in terms of color quality — and superior in every other dimension.
My venue still has halogen lights available for rent. Should I use them?
Only if you have no other option. Venue-supplied halogen rental lights are typically old, poorly maintained, and expensive per show. Buying your own LED fixtures pays for itself within 2–3 shows compared to repeated halogen rental costs.
Can I replace halogen bulbs in my existing arm light fixtures with LED bulbs?
Sometimes, but not always. Some halogen arm light fixtures can accept LED MR16 replacement bulbs. However, the driver and dimmer in the original fixture may not be compatible with LED, causing flicker or reduced lifespan. In most cases, replacing the entire fixture is more reliable than retrofitting.
Ready to switch to LED? Browse our LED display arm lights or read our guide on how to choose the right fixture for your booth.