HID lighting is the most efficient way to convert electricity
into light that is available to the consumer. There are two types of HID grow
lights used for horticultural lighting:
High Pressure Sodium - HPS
High pressure sodium bulbs emit an orange-red glow. This band of light triggers
hormones in plants to increase flowering/budding in plants. They are the best
grow lights available for secondary or supplemental lighting (used in conjunction
with natural sunlight). This is ideal for greenhouse growing applications.
Not only is this a great flowering light, it has two features that make it a more
economical choice. Their average lifespan is twice that of metal halides, but
after 18,000 hours of use, they will start to draw more electricity than their
rated watts while gradually producing less light. HPS bulbs are very efficient.
They produce up to 140 lumens per watt. Their disadvantage is they are deficient
in the blue spectrum. If a gardener were to start a young plant under a HPS bulb,
she/he would see impressive vertical growth. In fact, probably too impressive.
Most plants would grow up thin and lanky and in no time you will have to prune
your plant back before it grows into the light fixture. The exception to this
is using HPS grow lights in a greenhouse or in conjunction another light source
that emits light in the blue spectrum. Light sources that have a high output in
the blue spectrum like sunlight and MH grow lights offset any stretching caused
by HPS bulbs.
View MH & HPS grow lights
Plant Grow Lights
recently, fluorescent grow lights have had a low output and have been too big
and bulky to be of much use as a grow light for anything more than starting seedlings.
CFL and T5 full spectrum fluorescent lights have changed that. At 75 to 90 lumens
per watt, these lights are energy efficient and extremely effective especially
when used in numbers. Fluorescent grow lights also have better color rendering
properties (more of the light emitted is used by the plant) and produce much less
heat than incandescent and HID grow lights. This allows them to be placed closer
to plants (within a few inches) greatly decreasing lumen loss from the bulb to
the plant. It is recommended that these lights be placed no more than a couple
feet from the plants for best results.
View (CFL) compact fluorescent grow lights, View
T5 fluorescent tube grow lights
The standard T12 bulbs full spectrum tubes are fine for starts and seedlings
and are popular for growing low-light plants like herbs and African violets. These
lights are inefficient and are be replaced with high efficiency T5 lights which
are a better light source for flowering and budding applications as well.
View T5 fluorescent grow lights
Plant Grow Lights
grow lights are the newest lighting option for plants. They have come a long ways
from the days of blue and red bulbs and are now available in full spectrum natural
looking lights that blend in with the surroundings. LED lights are also among
the most efficient and coolest running grow lights available. The LED grow bulbs
we offer are completely compatible with T5 HO fluorescent fixtures. We offer them
as replacement bulbs to upgrade your existing fixture, or as a complete system.
They perform as well as the full spectrum T5 lights we offer while using less
electricity and last over twice as long.
View LED grow lights
Plant Grow Lights
lights are the most inexpensive to purchase but are also the most inefficient
and a poor source of light for plants. At best they can provide supplemental light
to individual house plants. Incandescent lights have a low lumen output per watt
compared to HID and fluorescent grow lights. New smaller CFL grow lights like
our 40 watt Green Thumb system produce as
much light as a 150 watt incandescent bulb, and more of the light is used by the
plant. This type of bulb will pay for itself in energy savings the first 60 days