F8S78H-20W

High effect series:Dailux factory is specialized in production of LED corn cob bulbs also called LED corn street lights and LED maize lighting.LED CORN BULB are Widely used in retrofitting HPS/MH/HID/CFL as street light, garden light, industrial light, solar light etc.Application locations are Warehouses, Production and logistics workshops, Retail stores,Amusement parks, Indoor stadiums and public places, and other industrial and commercial lighting purposes.Fit for fixtures as floodlight, canopy light, highbay light, acorn, cobra head, shoebox, wallpack, post top etc.

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Technical data 

Electrical data

Input voltage
Rated wattage
Operating frequency
Power factor  THD
100-277VAC
20W
50/60Hz
0.9
<15

Photometrical data

Lens
Milky lens
Transparent lens
Without lens
Rated luminous flux
2600 Lm±4%
2800 Lm±4%
3000 Lm±4%
LED Luminous Efficiency
130 LM/W
140 LM/W
150 LM/W
Color rendering index
Ra>80
Color temperature
2700-3500K,4000-4500K,5000-5500K,6000-6500K

Light technical data

LED Type
LED QTY
Max Temperature(Ta=25°C)
Thermal protection(Half-power)
Epistar
190 PCS
Tmax=64°C
95℃
Beam Spreads
Starting time
Power recovery temperature
Operating Temperature(Ambient)
360°
< 0.5 s
50℃
-40°C~45°C
Dimming
Lifetime Limited Warranty
Storage Temperature
No
50,000 hours
5 years
-40°C~85°C

Ordering Information

Example: F8S78H-20W-M-U4-E27-CW

Product
Watt
Lens
Voltage
Base
CRI
CCT
F8S78H
20W
30W
40W
M
Milky lens
T
Transparent lens
Blank
Without lens
U4
100-277
VAC

E26

E27

E39

E40
(screw
base)
Blank
82 CRI
WW
2700-3500K
NW
4000-4500K
PW
5000-5500K
CW
6000-6500K

Dimensions weight

Data
Number
 G.W.
Dimension

Lamp 

(E27)

1PCS

320g

(0.70lbs)

Φ78.0*190.0mm 

(Φ3.07*7.48inches)

Lamp

(E40)

1PCS

340g

(0.74lbs)

Φ78.0*215.0mm 

(Φ3.07*8.46inches)

Boxes
1PCS

500g/520g

 (1.10lbs/1.14lbs)

100.0*100.0*270.0mm 

(3.93*3.93*10.62inches)

Outer Carton
18PCS

9.90Kg/10.30Kg

 (21.82lbs/22.70lbs)

310.0*310.0*550.0mm 

(12.20*12.2*21.65inches)

F8S78 CE-EMC.pdf;                          F8S78 CE-LVD.pdf;                        F8S78 C-TICK.pdf;

F8S78 FCC.pdf;                                F8S78 PSE.pdf;                              F8S78 ROHS.pdf.

LED corn bulbs are with fan for good heat dissipation, but if the fan failed, is that affected led bulbs working seriously that means made bulb stop working?

No,even if fan failed, led corn lights are still working well,But what we want you know that the driver we used is with thermal protection fuction, that means when temperature of ambient or led bulb body reach above 95℃,The power consumption will be cut down in half power automatically, meantimes, the brightness also reduced to half automatically till the hot temperature reduced at 50℃,and then the half power and brightness will recovery full power consumption and full brightness automatically! 


So if fan failed in such conditions, This thermal protection function will be always working circularly to protect led lights.

Anyway,The role of Fan is making heat go out rapidly and completely. Actually, Please don't worry about fan,we used SUNON fan which manufactured from Taiwan,as the specification showed that fan operated at 25C degree ( normal temperature),the lifespan continue about 80,000hours,operated at above 50C degree( hostile environment),the lifespan also reach about 30,000hours,And until now, we have not received the complaints about fan problem from our customers..


About the length of LED corn light, Why the temperature must be higher with shorter length and used less SMD?? 

Actually,The truth is the temperature or heat will be increased more if shorter length no matter less SMD or more SMD based on same power consumption, But more SMD will be more better for heat dissipation anyway,For example,30W at 8pcbs with 20 SMD per pcb total 160 SMD without the LED on the front surface,so 30 Watt divide 160 SMD (30/160=0.1875 watt),that means each SMD should undertake 0.1875 watt, While 30watt at 8 pcbs with 24 SMD each,total 192 SMD without the SMD on the front surface,so 30 Watt divide 192 SMD (30/192=0.15625 watt), that means each SMD just undertake 0.15625 watt from total power consumption.


Less power produced less calories heat,0.15625 watt per SMD will have lower temperature than 0.1875 watt per SMD based on same power consumption 30 watt. Absolutely, SMD number have no relations with the length of led bulb,Because total power consumption is still same 30 Watt,it produced calories amount of heat is same no matter how much SMD number or how length size used,just more length or fix a fan will help heat radiating rapidly and completely,keep long lifespan of led bulb for long time useage. 


Well,How about to design one row of SMD per pcb for LED corn bulbs more better solution for heat sinking than double rows?

As above information showed,same power consumption is Not changed,it produced same heat.So that means no matter one row or double rows,it showed same amount of calories heat. 


How do I measure the annual running cost of a 30 W LED corn bulb compared to a 105W Metal halide?

The running costs can be determined by the following.


Annual running cost $ = Wattage /1000 KWH x Hours (Number of hours use per day) x cents per KWH (Cost of electricity)
Example: What is the annual savings when I compare a Dailux energy saving 30W LED corn bulb used for 10 hours per day, 7 days per week, 52 weeks per year, with the cost of electricity at 21 cents per KW Hour ?
Annual Cost for Dailux energy saving 30W LED corn bulb = 30/1000 x (10 x 7 x 52) x $0.21 = $22.932.
Annual Cost for 105W Metal halide lamps = 105/1000 x (10 x 7 x 52) x $0.21 = $80.262

Based on the pathway projects with an average of 50 x 105W Metal halide lamps and a cost of electricity at 21 cents per Kilowatt hour, the annual savings would be more than $2800.00 per year.


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