What the different between SMD2835 and SMD3528 LED corn lamp?

What is the different between SMD2835 and SMD3528 LED Corn lamp?

The different between  SMD2835 and SMD3528 

Item	Brightness	Current	Power   (W)	Structure	Heat sink area	Effect of heat dissipation	Emitting angle	Light emitting area	Thickness	Efficacy (LM/W)
SMD2835	22-24lm	40-60mA	0.1-0.2	vertical	big	Optimal	120°	9.18mm	0.8mm	130-150lm
	24-28lm
	28-30lm
SMD3528	4-5;5-6lm	20mA	0.06	the vertical	no	poor	100°	4.5mm	2.2mm	90-100lm
	6-7;7-8lm
					VS
SMD2835						SMD3528
Core advantage of SMD 3528
1, The vertical structure: Chip direct conduction fins to improve the heat dissipation performance, which can withstand the higher current (40-60mA)
2, Large heat sink: larger than 3528 heat sink 2-3 times, excellent heat dissipation design, light decay of LED chip life more secure; ,
3.Oversized light-emitting surface: to improve the rate of light: up to 90%.
4, Ultra-thin structure:to solve the 3528been long-standing problem spot;
5, High optical efficiency: higher than 3528 luminous efficiency 2-3 times the luminous efficiency of up to 130-150LM / W;
6,Super stability: low light fades material, process, process maturity and stability.
7, The high cost: to achieve the same luminous flux, than 3528 costs reduced more than 25%
Testing reports for 2835 & 3528 LED corn light--60Watt
Light source		SMD 2835			SMD 3528		Result
Porduct:		60W LED corn light			60W LED corn light
Rated Power:		65.09W			65.28W		Same power consumption
Color Rendering Index:		Ra>80			Ra>70		SMD2835 Ra>80, excellent color rendering
Luminouse Flux		7645.8lm			6039.1lm		SMD2835 flux output more than 1500lm higher
Efficacy:		117.5lm			92.51lm/W		SMD2835 27% higher efficacy
Test Date:		2015/3/28			2015/3/28		Testing report available

Testing Report for SMD 2835 60Watt LED corn lamp:

Testing Report for SMD3528 60Watt LED corn lamp:

Core Advantage of SMD2835 LED corn light: