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Science Forum Index » Engineering - Lighting Forum » Edglit slim light box,light panel---http://www.edlite.hk
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| jenny |
 Posted: Sun Apr 27, 2008 9:21 pm |
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Guest
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www.edlite.hk jenny@edlite.hk madamenihao@hotmail.com
◆Basic Differences Between T5, CCFL, EEFL and LED Light Boxes
The decision of what type of light box to buy can be somewhat
confusing if you do not analyze the unique properties that each light
box has, and weight these properties against a list of prioritized
reasons for which you are purchasing a light box. The following is a
list of things to consider when purchasing your light box.
Aesthetics: Does the look of the light box weigh heavy on your
purchasing decision? If it does, then the first choice would be that
of lamp source. Edlite offer the four lamp source slim light box [LED,
EEFL,CCFL, T5] for you choice. Then, beyond choosing lamp source, you
should look at the profile of the frame. The newest breakthrough in
light box technology is the emergence of LED's. By utilizing very
small footprint LED lamps, the frame of the light box can be reduced
down to 0.59 inches thick. This is less than 5／8" thick! This LED
light box is not even a box: It is a panel! It has a very sleek and
thin look when mounted to your wall. If I were purchasing for a high-
end department store, this is elegant look I would want to portray.
Electrical Consumption: This is not a consideration one usually puts
at the top of the priority list when purchasing light box panels, but
believe it or not, it is a very important factor. See chart below.
Who is Going to Change the Bulb? This is a very important
consideration that most purchasers don't even think about up front. Do
you have a full-time, reliable janitorial or facilities management
staff? Will you be shutting down each light box at the end of each
business day, and turning them back on in the morning? Don't kid
yourself, this virtually never happens! Traditional T5 light boxes
have bulbs that last about 1.5 years if you are leaving the light box
on 24 hours a day, 7 days a week. When just one of two bulbs dies, a
huge cold spot [shadow] appears on your light box. Will a janitorial
person quickly take notice, have extra T5 bulbs on hand, and come
quick for a bulb change-out? Will the box sit idle for days on end,
half lit up and half in shadows? The maintenance and bulb change-out
is simple, but like mowing your lawn or cleaning your gutters, it can
be an annoying and often procrastinated chore. So, if bulb changing is
not your thing, don't choose T5 technology.
CCFL have a more difficult symptom: Their bulbs are very difficult to
change because they are very thin and installed into the light box
frame in an integrate manner. Unless you have a knack for tinkering,
or some craftsman-type ability, these light boxes usually need to be
returned to the factory for bulb replacement. The good point is that
CCFL bulbs will last 4 to 5 years [if leaving the light box on 24
hours per day, 7 days per week]. Believe it or not, for smaller light
panels - less than 27" x 41" - many customers can justify the cost/
benefit after about 5 years; they will just reorder a new light box
when their old CCFL light box starts to deteriorate. This is one
reason why we only offer CCFL light boxes in smaller footprints [sizes
up to 27" x 41"]. Larger footprints tend to become more permanent
fixtures, installed into walls at airports and so-forth. Un-mounting
the light box to change the bulb, or to return the entire light box
back to the factory, can be a huge burden. We personally are willing
to change the light bulb if it is returned to our factory, but then
your have to deal with UN-mounting the fixture, looking at an eyesore
on the wall during shipping time, and trying to find packaging
necessary to return the light box to the factory unharmed. For smaller
sized menu board and display stand applications, however, the CCFL
lamp can be a good choice - especially when you can justify replacing
the light box after 5 years. Also, the price of the light box 5 years
from now will probably be a fraction of today's cost.
EEFL light boxes have a life of about 50,000 hours of life, the bulbs
are easy to change, but easy to broken in the delivery.
LED light boxes have a life of about 100,000 hours of life! For all
practical purposes, this light box is going to last and last 100,000
hours divided by 8760 hours per year= 11.41 years]. You will spend a
bit more on the upfront purchase, but you will get payback in both
convenience and cost-savings from bulb replacement (labor and
materials).
Brightness: We have designed and specified all of our light boxes to
be of good quality brightness. If you want the strongest brightness,
and the ultimate impression, EEFL light boxes are the best;
Budget: A very tricky question to answer: "apparent budget" or "true
budget"? "Apparent budget" refers to the initial purchase price, while
"true budget" reflects the true cost after factoring in electrical
consumption and the cost of bulb replacements.
T5 light boxes are the cheapest; they have the lowest "apparent
budget", but can easily cost more then the most expensive LED light
box after 4 to 5 years of use.
EEFL light boxes are suit for the large size slim light box. For the
very large size, the backlit design should be choice, and only the
EEFL & T5 lamp could be viable. The ?"apparent budget" of EEFL light
box would be more, but the electrical savings with a EEFL box will be
more than the initial cost difference between the T5 and EEFL box. ?
CCFL light boxes are in the range of the T5 with "apparent budget",
only costing slightly more than T5's. Electrical consumption savings,
however, will soon pay for this difference. After just one year, the
electrical savings with a CCFL box will be more than the initial cost
difference between the T5 and CCFL box
LED light boxes are by far the most expensive for "apparent budget",
but this premium can quickly be justified [money saved from operating]
over a few years. Adding together the combination of electrical
efficiency [very good], bulbs that last forever [11 years], and sleek
profile, it often benefits to "pay-up" and invest more today on the
initial purchase.
Environment: All fluorescent bulbs (CCFL & T5), from tubes to
compacts, contain a small amount of mercury vapor to create the light.
Intact bulbs are not considered hazardous, but when thrown away, the
bulbs get crushed and the mercury is released. Though it is a small
amount of mercury that would not harm you on an occasional basis many
countries have deemed the bulbs hazardous waste. Agencies such as the
European Waste Catalogue (EWC), Environment Agency in the UK, and the
Environmental Protection Agency (EPA) in the US have guidelines for
disposing of these lamps. The EWC for example, requires that hazardous
and non-hazardous waste be disposed of in separate landfills. Most
agencies advocate that fluorescent lamps should be sent for recycling
as a way of better managing the waste. Companies such as SustainaLite
(www.sustainalie.co.uk) list organizations on their website that
provide recycling services and in the US most state or city websites
provide information. The once acceptable practice of throwing them
away is no longer acceptable and users of fluorescent lamps have "Duty
of Care" to dispose of lamps properly. While rules and regulations for
disposal vary, during the life of the bulb practicing energy
conservation techniques is always encouraged. Fluorescent bulbs offer
great environmental advantages in that they convert electricity into
illumination three to five times as efficiently as incandescent lights
thus using less energy and lamp life is longer.
Comparison Chart: CCFL v. T5 v. LED v. EEFL
CCFL T5 LED EEFL
Advantages
Thickness/Depth of Light Panel 1.38"(35mm) 1.57"(40mm) 0.59"(15mm)
2.1"(54mm)
Weight [for 24" x 36" panel] 17 lbs.(7.8kg) 24 lbs(11kg) 10 lbs(4.5kg)
35 lbs(15kg)
Brightness- Smaller Panels < 24" wide 2100 LUX 3500 LUX 2000 LUX 5500
LUX
Brightness- Larger Panels > 30" wide 1750 LUX 2800 LUX 1850 LUX 5000
LUX
Light Distributed Evenly, No Bulb Shadows? Yes Yes Yes Yes
Type of Lamp, Light Bulb Used CCFL T5 LED EEFL
Average Hourly Life of Lamp/Bulb 30,000 to 40,000 hours 10,000 to
15,000 hours 100,000 hours 45,000 to 50,000 hours
Life of Lamp/Bulbs** 4 years 1.5 years 11.5 years 5 years
Ease of Bulb Replacement Difficult: Must be done at factory Easy:
Standard Fluorescent Replacement Not Needed Easy: Standard
Fluorescent
Power Consumption Watts 22 54 20 25
Annual Electrical Use in Kilowatt Hours 193 kWh 473 kWh 175 kWh 219
Power Consumption Expense @ $.15/kWh $29.00 $71.00 $26.30 $32.90
Disadvantages Must change bulb every 4 years;Bulbs can be very
difficult to replace: Must return to factory in most cases.Bulbs is
easy to broken in the delivery. Power consumption expensive;Must
change bulbs every 1.5 years and downtime between changes Most
expensive;Brightness or LUX deteriorates for extra large panels beyond
36"w(900 mm) Must change bulb every 5 years;Bulbs is easy to broken in
the delivery.
**Prior to significant brightness deterioration; thus bulb replacement
needed- in Years assuming used 24 hours per day/7 days per week
◆ Edlite LED thin box(Edlite display) is salable in the world.Please
kindly check for the salable code for you as following:
Specification of LED thin box(Edglite display) 17-Mar-08
Model Thickness of optical panel Distance of each LED Thickness of
frame Power Sided Poster size Suggested Max. Frame Size Frame Color
ED-F8 0.2" (5mm) 0.39" (10mm) 0.59" (15mm) DC-12V Single Frame size -
1.18" 27.5" x 63" Silver
ED-F10 0.2" (5mm)×2 0.39" (10mm) 1.18" (30mm) DC-12V Double Frame size
- 1.26" 27.5" x 63" Silver
ED-F9 0.3" (8mm) 0.24" (6mm) 0.79" (20mm) DC-12V Single Frame size -
1.26" 39" x 94.5" Silver
ED-DF9 0.3" (8mm) 0.24" (6mm) 1.57" (40mm) DC-12V Double Frame size -
1.26" 39" x 94.5" Silver
ED-F11 0.3" (8mm) 0.39" (10mm) 0.98" (25mm) DC-24V Single Frame size -
1.26" 47" x 94.5" Silver
ED-F2 0.3" (8mm) 0.2" (5mm) 1.3" (33mm) DC-24V Single Frame size -
2.76" 47" x 94.5" Silver/Other
ED-F3 0.2" (5mm) / 0.3" (8mm) 0.24" (6mm) / 0.39" (10mm) 1.38" (35mm)
DC-12V Single Frame size - 1.77" 35"× 48" Silver/Other
Crystal ED-P 0.3" (8mm) 0.24" (6mm) / 0.39" (10mm) DC-12V Single
Frame size - 5.12" 35" x 48" crystal
Crystal ED-DP 0.3" (8mm) 0.24" (6mm) / 0.39" (10mm) DC-12V Double
Frame size - 5.12" 23.5" x 48" crystal
Remark:
1.For the very large ED-F9 & ED-DF9 ,we would also use the DC-24V
power system.
2.The ED-F2 & ED-F3 could be color,but would cost would be increase
15%.
3.When the width of ED-P is > 23.6 inch,the distance of each LED is
0.24"(6mm);When the width of ED-P is between 11.8~ 23.6 inch,the
distance of each LED is 0.39"(10mm).
4. When the width of ED-DP is >18 inch,the distance of each LED is
0.24"(6mm);Else is 0.39"(10mm)
Guangzhou Edlite Company Limited, one of Comprehensive Hi-tech slim
light box manufacturers, are specialized in developing, manufacturing
and marketing of LED slim light box, CCFL slim light box, EEFL slim
light box, Fluorescent (T4/T5) slim light box. Our products are widely
used in bank, securities, traffic system (highway, airport, railway
and subway etc), hospital, and stadium and amusement etc public place. |
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| Victor Roberts |
| Posted: Mon Apr 28, 2008 2:57 pm |
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Guest
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On Mon, 28 Apr 2008 00:21:35 -0700 (PDT), jenny
<madamenihao@gmail.com> wrote:
[snip]
Quote: LED light boxes have a life of about 100,000 hours of life! For all
practical purposes, this light box is going to last and last 100,000
hours divided by 8760 hours per year= 11.41 years]. You will spend a
bit more on the upfront purchase, but you will get payback in both
convenience and cost-savings from bulb replacement (labor and
materials).
The 100,000 hour life claim for LEDs has been discredited
for so long that I'm surprised to see it still being used.
Sure, LEDs will last for 100,000 hours, but their light
output will have dropped to such a low level that you will
wish they had died.
Can you tell use the lumen maintenance of the LEDs you use
in your light boxes at the end of 100,000 hours?
--
Vic Roberts
http://www.RobertsResearchInc.com
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