Factors Amko SOLARA Induction LED High Pressure Sodium Metal Halide Ceramic MH Mercury Vapor T8 T5
Ignition time instant instant 5-8 minutes 5-10 minutes 3-5 minutes 5-15 minutes instant instant
Hot Re-strike yes yes no no no no yes yes
Claimed Lifespan 100K 100K 30K 20K 30K 15K 10K 30K
Real World Lifespan 60-100K 30-50K 18-24K 8-10K 25K w/ electronic gear 10K 4K 8-10K
Average Mercury content 2-5mg N/A 12-50mg 10-1000mg
 
14-100mg 10-43mg 5.6mg
Mean Lumens per Watt 65-90 L/W 50-150 L/W 150 L/W 50-80 L/W 90-120 L/W 15-45 L/W 80-100 L/W 80-100 L/W
Lumen Maintenance 70% 45-60% 55-65% 55-60% 75% 55% 50-75% 50-75%
CRI >80 >75 21 64 >90 40 62 82
Color Temperature 2700-6500K 2700-6500K 2000K 3000-4000K 4000K 4000K 3000-5000K 3000-6500K
S/P Ratio* 1.96 1.85 0.62 1.49
 
0.86 1.62 1.62
System Waste very low very low high high low high low low
Flicker no no yes yes yes yes yes yes
Maintenance Cost very low very high high high medium high medium medium
Surface Temperature 60-80 ℃ 37-120℃ (@juncture) >300℃ >300℃ >300℃ >300℃ 35℃ 25℃



*An S/P ratio is the ratio of light measured by the scotopic and photopic methods. Lamps with high S/P ratios will improve visual ability
 

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