led vs hid: Complete Comparison

LED 与 HID 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 4000K LED high-bay fixture delivers 130–150 lm/W at the system level, tested per IES LM-79. Compare that to a 400W metal halide fixture, which struggles to hit 90 lm/W after ballast losses—and that's when it's brand new. The gap widens over time: LED lumen depreciation is about 5–10% over 50,000 hours (per IES TM-21 projections), while HID lamps lose 20–30% of their output by 60% of rated life. I've seen warehouses where the HID lights were so dim after three years that the forklift drivers complained.

Lifespan is where HID really can't compete. An LED module rated for L70 at 100,000 hours will still produce 70% of initial lumens after 11 years of continuous operation. A metal halide lamp, per ANSI C78.389, is typically replaced at 10,000–20,000 hours—that's every 1–2 years in a 24/7 facility. The catch is that LED drivers can fail earlier than the LEDs themselves, so look for drivers with 50,000-hour minimum life and 5-year warranties.

2. Cost Analysis

Upfront, HID still wins. A 400W metal halide fixture costs about $80–$120, while an equivalent LED fixture (20,000–25,000 lumens) runs $200–$400. But that's just the purchase price. What does this mean in practice? Run the energy numbers: at $0.12/kWh and 4,380 hours per year, that 400W HID fixture burns $210 in electricity annually. The LED replacement, drawing 150W for the same light output, costs $79. That's $131 saved per fixture per year.

Maintenance adds another layer. HID lamps need relamping every 1–2 years at $25–$50 per lamp plus labor—figure $50–$100 per fixture per year. LED fixtures typically need zero maintenance for 5–10 years. Bottom line: payback on LED retrofit is usually 1.5–3 years, and total cost of ownership over 10 years favors LED by 40–60%. I've done the math for a 200-fixture warehouse: switching from 400W metal halide to 150W LED saved $26,000 per year in energy and $8,000 in maintenance.

3. Application Suitability

LED dominates everywhere instant-on, dimming, or precise control matters: warehouses, parking garages, offices, retail, and outdoor area lighting. HID still has a niche in very high-bay spaces (40+ feet) where the sheer lumen density of a 1000W metal halide is hard to match with a single LED fixture—though multi-LED arrays are closing that gap fast. For sports lighting, LED's instant restrike and flicker-free operation at high frame rates (per IEEE 1789) make it the clear choice for broadcast. HPS (high-pressure sodium) still sees use in street lighting where color doesn't matter and the budget is extremely tight, but even there, LED's 50–70% energy savings are winning most bids.

4. Pros & Cons

LED Pros: 120–160 lm/W efficacy, 50,000–100,000 hour life, instant on/off, dimmable, no mercury, excellent CRI options, low maintenance. Cons: Higher upfront cost, sensitive to high ambient temperatures (derating above 50°C), potential for glare if optics are poor.

HID Pros: Low initial cost, very high lumen output per single lamp (up to 110,000 lumens for 1000W), proven technology. Cons: Low efficacy (70–110 lm/W), short life (10,000–24,000 hrs), slow warm-up and restrike, contains mercury, poor dimming, significant lumen depreciation over life.

Best Use Cases

Final Recommendation