led vs halogen: Complete Comparison

LED与卤素灯全面对比

Head-to-Head Comparison

Detailed Analysis

1. Performance

Let's start with the numbers that matter most. A typical 4000K commercial LED panel delivers 120–140 lumens per watt. A halogen equivalent? You're looking at 12–22 lm/W. That's a 6x to 10x difference in efficacy. What does this mean in practice? For a 10,000-lumen installation — say a small warehouse bay — you'd need 500W of halogen or just 70–80W of LED. The heat difference alone is staggering: halogen dumps about 90% of its input energy as heat, while LED manages to keep that under 20%.

Lifespan is where the gap becomes almost comical. Halogen lamps are rated for 2,000 to 4,000 hours — that's about 6 months of continuous use. LEDs, tested per IES LM-80 and TM-21, typically hit 50,000 hours to L70 (70% of initial lumen output). I've seen LED panels in a factory floor that ran 24/7 for over 5 years without a single replacement. You'll change a halogen lamp 12 to 25 times in that same period. The catch is that LED lumen depreciation is real — it's not a cliff failure like halogen, but a gradual fade. That's why we use L70 as the benchmark.

CRI is the one metric where halogen still wins on paper. Halogen's continuous spectrum gives it a perfect CRI of 100 by definition. LEDs can hit 95–98 CRI, but only with premium phosphor blends and at a cost premium. For retail display lighting where color rendering is critical — think jewelry or art galleries — a high-CRI LED at 95+ is indistinguishable from halogen to the human eye. But for general office or warehouse work, an 80 CRI LED is perfectly adequate and far more efficient. I've been on job sites where the client insisted on 90 CRI for a parking garage — total overkill, but they paid for it.

2. Cost Analysis

Here's where the spreadsheet tells the story. Upfront, halogen is cheaper: a 500W halogen floodlight costs about $10–$15, while an equivalent 50W LED floodlight runs $40–$80. But that's a trap. Run that halogen for 10,000 hours at $0.12/kWh and you'll spend $600 on electricity. The LED? About $60. That's a $540 saving per fixture over its life. And you'll replace the halogen lamp 3–5 times in that period, adding another $30–$50 in lamp costs and labor. The payback period for LED is typically 6–18 months depending on local electricity rates and usage hours.

Maintenance costs are the hidden killer with halogen. Every lamp change means a ladder, a technician, and downtime. In a high-bay warehouse with 40-foot ceilings, a single lamp replacement can cost $150–$200 in labor and equipment rental. LEDs eliminate that for a decade or more. I've seen facilities where the maintenance budget dropped by 80% after switching to LED. The only caveat is driver failure — LED drivers typically last 50,000–100,000 hours, but a bad batch can fail early. That's why you want fixtures with replaceable drivers, not integrated ones.

3. Application Suitability

Halogen still has a place in a few specific scenarios. If you need instant full brightness in a dimmed theatrical setting with legacy dimmer racks, halogen is plug-and-play. LEDs require trailing-edge dimmers and can flicker or buzz with old leading-edge systems. For accent lighting in museums where color temperature must be exactly 3000K and CRI 100 is non-negotiable, some curators still prefer halogen. But that's a shrinking niche.

For everything else — offices, warehouses, parking lots, retail, hospitality, outdoor area lighting — LED is the default. The versatility of CCT selection (2700K to 5000K in the same fixture), dimming down to 1%, and zero warm-up time makes it superior. In cold environments like freezers, LEDs actually perform better (efficacy increases at lower temperatures), while halogen struggles. I've installed LED tubes in walk-in freezers at -20°C — they fired up instantly at full brightness. Halogen would have taken minutes to warm up.

4. Pros & Cons

LED Pros: 6–10x higher efficacy, 10–25x longer lifespan, lower heat output, instant on, wide CCT range, dimmable to 1% with compatible drivers, no mercury, RoHS compliant, 5–10 year warranty. Cons: Higher upfront cost, requires compatible dimmers, potential for color shift over life (though ANSI C78.377 limits this), some early driver failures in cheap fixtures.

Halogen Pros: Lowest upfront cost, perfect CRI 100, works with any dimmer, warm color temperature, simple replacement. Cons: 90% of energy wasted as heat, 2,000–4,000 hour lifespan, high energy cost, hot to touch (burn risk), fragile quartz envelope, banned in some jurisdictions (EU phased out 2018 per EU 2015/1428).

Best Use Cases

Final Recommendation