LED & HPS Grow Lights

Choosing the Right Grow Light

The light is doing the heaviest lifting in any indoor setup, it is what your plants are actually photosynthesising off, so it is worth getting right before anything else. We stock full spectrum LED grow lights from SANlight and Medic, plus HPS options including lamps, reflectors, and ballasts, sized for everything from a 60x60cm propagation tent through to a 150x150cm flowering room.

Full spectrum LED has become the default for most Australian growers, and the reason is straightforward: less heat, lower running costs, and a fixture that lasts well beyond a single grow. A quality full spectrum LED plant grow light delivers the complete wavelength range plants need from seedling through to harvest without the running costs or heat management that HPS demands. HPS still has a place though, particularly in cold climates where the extra heat it throws off genuinely helps during winter instead of working against you.

Matching wattage to your tent footprint matters more than chasing the highest number on the box. A light built for 120x120cm run in an 80x80cm tent wastes electricity and adds heat you don't need, while an undersized light in a bigger tent leaves the corners underlit. Check the recommended coverage on each fixture before you buy, not just the wattage.

Not sure how much light your plants actually need at each stage? Our PPFD guide breaks down target light intensity by growth stage. If you're weighing up a purpose-built fixture against a cheaper hardware-store option, our grow lights vs Bunnings comparison covers where the difference actually shows up. Already dealing with stretched, leggy seedlings? That's usually a light height and intensity issue, our leggy seedling guide explains why it happens and how to fix it. Deciding between our two LED ranges? Our SANlight EVO vs Medic SS420+ comparison breaks down which suits your setup.

Free shipping runs on three tiers to VIC, NSW, QLD, SA and ACT: $150 or more up to 3kg, $250 or more from 3 to 5kg, and $350 or more from 5 to 12kg. Most full spectrum LED fixtures on this page are over $350 and under 12kg, so they qualify on their own without adding anything else to your cart. Lighter items like propagation bars and replacement lamps often qualify at the lower tiers.

Grow Light Guides

New to lighting and not sure where to start? Our PPFD guide explains the actual metric that matters when comparing fixtures. Considering a cheaper hardware store option first? Our grow lights vs Bunnings comparison lays out the real numbers side by side. Seedlings stretching under your current light? Our leggy seedling guide covers light height and intensity fixes. Weighing up SANlight against Medic? Our SANlight EVO vs Medic SS420+ comparison breaks down which suits your setup, and our running costs guide covers what any of these fixtures actually cost to run in your state.

Frequently Asked Questions

Is LED or HPS better for hydroponics?
Full spectrum LED runs cooler and cheaper for most Australian conditions. HPS can still make sense in genuinely cold climates where the extra heat reduces your winter heating costs.

What size grow light do I need for my tent?
Match the fixture to your tent's footprint, not just wattage. Each light listing shows the coverage area it is designed for, a full spectrum LED sized for 120x120cm will underperform in a 150x150cm space regardless of the wattage on the label.

How high should I hang my grow light?
Depends on the fixture and growth stage. Generally 30 to 60cm above the canopy for LED, adjusting closer as plants mature and can handle more intensity.

Do I need to dim my light for seedlings?
Yes. Most full spectrum LED grow lights include dimming for exactly this reason, start low for seedlings and clones and increase intensity as plants establish.

Do grow lights qualify for free shipping?
Most do. Free shipping applies on three tiers to VIC, NSW, QLD, SA and ACT, and the top tier covers orders of $350 or more up to 12kg. Most single LED fixtures meet both on their own. Lighter propagation bars and lamps can qualify at the $150 or $250 tiers instead.