Source Name	Low- frequency FEDL	High- frequency FEDL	Incan- descent	Fluo- rescent	High-pressure mercury lamp	Cast Xenon	High- Voltage Mercury lamp	Metal Halide Lamp
Wattage （W）	15-400	40-200	5-200	3-250	50-1000	1500- 100000	70-400	70-1000
Light effect  (lm/w)	75-95	63	6.5-19	25-67	30-50	20-37	90-100	60-80
Average Life  （h）	100000	50000	500	4000	5000	5000	5000	5000
CRL(Ra)	88	80	95-99	70-80	30-40	90-94	20-25	65-85
Steady start Time	Instantane-ous	Instantane-ous	Instanta-neous	1-3s	4-8min	1-2s	4-8min	4-8min
Re-start time	Instantane-ous	Instantane-ous	Instantane-ous	Instantane-ous	5-10min	Instantane-ous	10-20min	10-15min
Power Factor	≥0.98	0.98	1	0.4-0.9	0.44-0.67	0.4-0.9	0.44	0.6-0.9
Strobo- scopic	NO	NO	Not obvious	obvious	obvious	obvious	obvious	obvious
Surface Brightness	Weaker	Weaker	Strong	Weaker	Stronger	Strong	Stronger	Strong
Surface Temperature	＜90℃	High	High	＜90℃	Higher	Higher	About 300℃	High
The impact of changes in voltage flux	Weaker	Weaker	Strong	Stron- ger	Stronger	Strong	Stronger	Strong
Environmental impact of temperature on the flux	Weak	Weak	Weak	Strong	Weaker	Weak	Weaker	Weaker
Seismic Performance	Very good	Good	Poor	Very good	Good	Good	Very good	Good
Light Direction	Arbitrary	Arbitrary	Arbitrary	Well Sexual	Vertical	Arbitrary	Arbitrary	Arbitrary
Required Annex	Ballast	Ballast	No	Ballast	Ballast	Ballast Flip-Flop	Ballast	Ballast Flip-Flop
Visual Effect	Very good	Good	General	Good	Good	Good	Bad	Good