DOUBLE-ENDED LIGHTING TECHNOLOGY
DE globes, as they emit more useable
light per lamp, so fewer fixtures are
required. If high temperatures are
a real concern, it’s worth looking
into reflector options with built-in
ventilation ports, although this will
degrade the light. Air-cooled fixtures
provide significantly less useable
light because the nitrogen-filled
outer balloon is designed to operate at a select temperature. Some
poorly designed units encourage
direct airflow over the globe, causing
the ballast to increase amperage to
achieve the same brightness.
The last point worth noting before
you upgrade to a DE lighting set-up
is to always ensure the ballast, globe
and reflector work efficiently together.
Newer models of DE globes have
brought 400-V technology, previously
only used in commercial
greenhouses with three-stage
power, to home growers
using ballasts that adapt
residential voltage to drive
a high-powered lamp.
These ballasts should
operate at frequencies
greater than 100 kHz for a
smooth, crisp light output your
plants will definitely appreciate.
It’s always worth talking to your local
hydroponics retailer to ensure all of
your equipment is compatible and
effective for your growing needs.
“GROWROOM
TEMPERATURES
WILL BE GENERALLY
LOWER WITH DE
GLOBES, AS THEY
EMIT MORE USEABLE
LIGHT PER LAMP, SO
FEWER FIXTURES
ARE REQUIRED.”
140
Maximum Yield USA | November 2015