The public library in Ølstykke, a town of 20,000 on the northern part
of Denmark’s largest island, Zealand, north of Copenhagen, was having problems
with the lampposts in its parking lot. Not only were the standard 75-watt bulbs
used in each of its 30 lamps a tremendous drain on electricity, but the lamps
themselves were habitual targets for young vandals. Consequently, library patrons
often were left in the dark for days, until the bulbs were replaced.
Kristian and John Henckel from Henckel Gruppen ApS, LEDtronics representatives
in Denmark, came to the rescue. For demonstration, they replaced the Philips
75-watt incandescent E27 bulbs of two streetlights in the parking lot with
15-watt LEDtronics PAR30 LED lamps, one warm white and the other, daylight
They took lumen measurements before and after the replacement. The meter was
placed on the ground and indicated 9 Lux for the incandescent lamps [see photo
1 below], while it measured 93 lux for the LEDtronics daylight white lamp [photo
2]. When measured at a height of 3.1 meters above ground, the meter showed
85 Lux for the LEDtronics warm white bulb.
“The result was amazing!” said John. “The city engineer
and the vice director were so impressed with the results that they refused
to let us take back the test bulbs, as they planned to provide demonstrations
for the rest of the staff of the Egedal Kommune (municipality).”
John and Kristian estimate the town has some 1,000 of this type of lamppost,
called Vintergaekker (named after the snowdrop plant whose shape it borrows).
It is an older type of lamp that is being replaced in many municipalities. “In
this case, instead of changing the lamps, they saved money by changing just
the bulbs,” says John. “In addition to saving 60 watts per lamppost,
now the bulbs are much more difficult for vandals to destroy because of the
With an 80% power reduction and 1033% more light intensity, the Henckels say
Egedal has subsequently decided to start the gradual switch to LEDtronics LED
lighting all around the kommune in the near future, especially since the townspeople
pride themselves for being scrupulous energy savers.
“The parking lot will, according to energy calculations, have simple
payback within just one year,” says John. “If you disregard service
costs and count only energy savings, they will earn money back in 23 months.
And since other municipalities heard about this, we have already had meetings
on other and much larger projects with them as well.”
Products tested were of type: PAR30-15W-XPW-001M and PAR30-15W-XIW-001M
The product used: PAR30-15W-XPW-001M
LEDtronics Sales Rep Firm involved with this application:
Henckel Gruppen ApS
Havnegade 19 DK 4970 Rødby,
Phone: +45 7022 7333
Fax: +45 7022 7555