Grow Lamps

Time to choose a grow lamp? Choices, choices.

It’s important that you use the right one at the right time.

Take a look at our range of 24W, 55W, 125W, 250W, 315W, 400W, 600W, 750W & 1000W lamps. There are tons to choose from, and all have been selected by us from the best manufacturers worldwide.

Here are some of the questions our customers ask to help them decide which lamp to use.

What growing lamps do you sell?

There are several types:

• CFL’s (Compact Fluorescent Lamps) mostly for propagation.

• T5, also fluorescent for mostly propagation

• Metal Halide (MH) lamps for vegetative growth

• High Pressure Sodium (HPS) lamps for flowering

• Dual Spectrum High Pressure Sodium (HPS) lamps for vegetative growth and flowering

• Light Emitting Plasma (LEP) lamps are supplemental grow lights that emit lots of UVA & UVB

• Ceramic Discharge Metal Halide (CDM) lamps are also broad spectrum, supplemental lights

Can I plug my lamp straight into my mains?

Only if you’re using a CFL fluorescent lamp. Otherwise, you will need to connect your lamp to your ballast. CFL grow lamps actually have an inbuilt ballast.

Do I need to use a different grow lamp for flowering than I do when vegging?

Plants need blue wavelengths of light during vegetative growth, and red wavelengths of light for flowering.

You can use a MH (metal halide) lamp when vegging, then switch to a HPS (high pressure sodium) lamp when flowering. But this is a pretty old school way of growing.

It’s much easier to use a dual spectrum HPS lamp throughout your grow. It emits both blue and red wavelengths of light.

Just make sure you run it for 18 hours a day when vegging, and 12 hours a day when flowering.

How do I know what wattage to use?

It all depends on the size of your tent or growing area. It’s about getting the light intensity right for the space you are growing in.

• 1 x 250W indoor grow lamp per 0.75m x 0.75m area

• 1 x 400W indoor grow lamp per 1m x 1m area

• 1 x 600W indoor grow lamp per 1.2m x 1.2m area

• 1 x 1000W growing lamp per 1.5m x 1.5m area

To get the uniformity of light nice and even across the grow room, you may need multiple lights.

How often should I replace my grow light bulb?

For HPS bulbs it can be anything from 3 months to 1 year. What you need to remember is that every 1% of light loss costs you 1% of your yield. HPS lamps naturally degrade over time at an average of 1% reduction every 1000 hours. When the loss of yield is costing you more than a new lamp, replace!

Can I use a 400V HPS lamp?

400V HPS lamps have a higher output compared to standard 240V HPS lamps, so are the lamp of choice if you are looking for the best results.

However, you can only use a 400V lamp in a 400V lighting system, like our Gavita and Dimlux Fixtures.

What’s the difference between a double and single ended lamp?

Single ended lamps connect to the reflector at one end only. Double ended lamps connect to the reflector at both ends. This means that you’ll get a much more even burn throughout the lamp, which leads to accurate colour rendering.

Can I clean my grow lamp?

If you’re going to clean it, make sure that you never touch it with your hands – always wear gloves when handling. Clean it with a dry cloth only - never spray it with anything.

What lamp holder do I need?

Most grow light bulbs can fit into an E40 fitting. There are a couple of exceptions - CDM lamps, for instance have a different fitting. To connect one to a standard reflector, you’ll need to buy an E40 adaptor.

T5 lights are another exception, but you would never need to connect them to an E40 fitting anyway, as they’re used in T5 fixtures.

Why won’t my plant lamps turn on?

It could be an issue with your lamp, or it could be time to replace your ballast. If it’s a new lighting system, make sure your lamp is screwed in all of the way, and that no fuses have blown.

Does my lamp have to be the same wattage as my ballast?

Yes. Try to mix the wattages up and either the lamp or ballast will fail, potentially causing a fire.

Even if you have a dimmable digital ballast, make sure you use the correct wattage lamp, then dim or boost it.