led vs metal halide: Complete Comparison

LED与金属卤化物灯：全面对比

Head-to-Head Comparison

Detailed Analysis

1. Performance

Let's start with the numbers that matter most on a spec sheet. A typical 400W metal halide fixture — the kind you'd see in a warehouse or gymnasium — delivers about 36,000 initial lumens, but with ballast losses you're looking at a system efficacy of roughly 75 lm/W. Compare that to a 150W LED high bay: you'll get 22,500 lumens at 150 lm/W. That's double the efficacy. And here's the kicker: the metal halide lamp will lose 30–40% of its light output by 10,000 hours, while a quality LED fixture using LM-80-tested LEDs will still be at 90% or better at 50,000 hours. I've seen warehouses where the MH lamps were replaced every 18 months just to keep foot-candle levels at spec.

What about color? Standard metal halide lamps sit at 65–75 CRI, which gives everything a greenish-blue tint — fine for parking lots, terrible for retail. Ceramic metal halide bumps that to 85–90 CRI, but at a premium cost and still with fixed CCT. LED can hit 90+ CRI across the board, and you can dial in 3000K, 4000K, or 5000K at the fixture. The catch is that high-CRI LEDs (95+) still carry a 10–15% efficacy penalty, so if you're chasing both, expect to pay more.

2. Cost Analysis

Here's where the math gets brutal for metal halide. A 400W MH fixture costs maybe $80 installed. An equivalent 150W LED fixture runs $180–$250. That's a 2–3x upfront premium. But run the numbers over 10 years. At 4,000 hours annual operation and $0.12/kWh, the MH burns $1,920 in electricity per fixture. The LED? $720. That's $1,200 saved per fixture — every year. Payback happens in 6–12 months depending on your utility rates and any rebates. I've done this calculation for a 200-fixture warehouse and the annual savings alone covered a new forklift.

Maintenance is the hidden killer. Metal halide lamps need replacement every 1–2 years. In a 40-foot ceiling, that means a scissor lift, two guys, and an hour per fixture — call it $150 per replacement. Over 10 years, that's $750–$1,500 in labor per fixture. LED fixtures typically need zero maintenance for the first 5–7 years. Add in the cost of ballast failures (common in MH after 3–5 years) and the total cost of ownership gap widens further. Bottom line: LED wins on TCO by a factor of 2–3x over a 10-year horizon.

3. Application Suitability

Metal halide still has a pulse in a few places. If you're lighting a museum gallery where color accuracy above 95 CRI is the only metric that matters, and the budget is open-ended, a ceramic metal halide source with a high-CRI phosphor can still outperform most LEDs. Same goes for some film and stage applications where the spectral output of MH creates a specific look that's hard to replicate with LED. But for warehouses, parking garages, retail stores, offices, gymnasiums, and street lighting — LED is the default. The instant-on and restrike advantage alone kills MH for any space with occupancy sensors or emergency lighting requirements.

4. Pros & Cons

LED Pros: 120–150 lm/W efficacy, 50,000–100,000 hour lifespan, instant on/off, full dimming (0–10V or DALI), zero mercury, field-selectable CCT, 5–10 year warranty. LED Cons: Higher upfront cost, thermal management critical (heat sinks needed), some cheap drivers fail early, color shift can occur over decades if binning is poor.

Metal Halide Pros: Lower initial fixture cost, very high CRI options (95+), familiar spectral output for some professionals, high lumen output per lamp. Metal Halide Cons: 65–100 lm/W efficacy, 10,000–20,000 hour lifespan, 3–10 minute warm-up, 10–20 minute restrike, contains mercury (hazardous waste), rapid lumen depreciation, ballast failures, no dimming.

Best Use Cases

Final Recommendation