LED grow lights
by Vanguard Hydroponics
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The Cosmos LED Board 150W is a full spectrum LED grow light from Vanguard Hydroponics that covers both vegetative and flowering stages from a single, flat-panel unit. At 150 watts, it sits in the sweet spot for small to mid-sized grow tents — enough output to drive real photosynthesis without turning your electricity bill into a horror show. If you're running a 60x60 or 80x80 tent with two to four plants, this board delivers the light your canopy actually needs.
The grow light market is stuffed with options, and at 150W you've got choices. So why this one? The Cosmos LED Board 150W by Vanguard Hydroponics runs a full spectrum diode array — that means it outputs light across the wavelengths your plants actually absorb, from the blue end that drives compact vegetative growth through to the red wavelengths that push flowering and resin production. You're not swapping bulbs or panels between growth stages. One board, seed to harvest.
The customisable settings let you dial in for veg or bloom independently. During the vegetative phase, you push the blue-heavy spectrum to keep internodal spacing tight and leaves broad. Flip to flowering mode and the red spectrum ramps up, signalling your plants to focus energy on bud sites. It's a straightforward system — no app required, no Bluetooth nonsense that stops working after a firmware update.
Weight-wise, LED boards like this are noticeably lighter than older HPS or MH setups. You're not wrestling a heavy ballast into position or worrying about heat buildup melting your tent's ceiling. The Cosmos 150W mounts flat against the top of your tent, distributing light evenly across the canopy below. We've seen growers get surprisingly uniform growth from corner to corner with a properly positioned board like this — something that blurb-style fixtures with narrow beam angles struggle with.
| Spec | Value |
|---|---|
| Brand | Vanguard Hydroponics |
| Model | Cosmos LED Board |
| Wattage | 150W |
| Spectrum | Full spectrum (veg + bloom) |
| Lighting Modes | Customisable veg and flowering settings |
| Recommended Tent Size | 60x60cm to 80x80cm |
| SKU | GS0031 |
| Technology | LED board (flat panel) |
| Mounting | Overhead suspension (hangers/clips) |
Here's the honest truth about LED grow light wattage: more isn't always better. A 600W panel in a 60x60 tent will cook your canopy. A 50W panel won't penetrate past the top leaves. At 150W, the Cosmos LED Board gives you enough photosynthetic photon flux to drive healthy growth in a small tent without generating excessive heat or burning through electricity.
Running this board for 18 hours a day during veg costs you roughly 2.7 kWh per day. Compare that to a 400W HPS setup pulling 7.2 kWh for the same photoperiod — you're saving around 60% on energy consumption for a comparable growing footprint. Over a 3-4 month grow cycle, that adds up to a meaningful difference in your running costs. The lack of a separate ballast also means one less component generating heat in your tent, which keeps your extraction fan and climate control working less hard.
We'd pick the Cosmos 150W over budget blurple panels every time. Those cheap purple-tinted lights from marketplace sellers might look impressive with their blue and red LEDs, but they typically lack the intermediate wavelengths — the greens, far-reds, and warm whites — that a proper full spectrum board includes. Those "missing" wavelengths penetrate deeper into the canopy and drive photosynthesis in the lower bud sites that blurple lights leave in the dark.
The Cosmos 150W is not a tent-filler for anything larger than 80x80cm. If you're running a 100x100 or 120x120 tent, you'll need two of these boards or a higher-wattage unit to avoid dark spots at the edges. Light falls off sharply past the board's footprint, and your corner plants will stretch and underperform if they're not getting adequate photons.
Also worth noting: 150W full spectrum LED boards don't generate much heat, but they do generate some. In a small 60x60 tent with poor ventilation, even a modest heat source can push temperatures above 28°C during summer. Make sure you've got an extraction fan pulling air through the tent — this isn't optional, it's critical for both temperature control and fresh CO2 exchange at the leaf surface.
One more thing — the Cosmos 150W doesn't include a dimmer. You're working with on/off and the veg/bloom mode switch. If you want granular intensity control (useful for seedlings or for dialling back during the final days of flower), you'd need to adjust hanging height instead. It's a minor inconvenience, not a dealbreaker, but worth knowing before you buy.
Complete your setup: pair the Cosmos 150W with a grow tent, carbon filter, and extraction fan for a proper closed environment. If you're growing in soil, a CalMag supplement and pH meter will keep your root zone dialled in. Already running hydroponics? A reliable pH controller keeps nutrient uptake consistent without daily manual adjustments.
| Feature | Cosmos 150W (Vanguard) | Budget Blurple 150W | Lumatek Zeus 1000W |
|---|---|---|---|
| Spectrum | Full spectrum (white + red) | Blue + red only | Full spectrum |
| Best Tent Size | 60x60 to 80x80cm | 60x60cm max | 150x150cm+ |
| Veg/Bloom Modes | Yes, switchable | Sometimes | Yes, dimmable |
| Dimmer | No | Rarely | Yes |
| Heat Output | Low | Low-moderate | Moderate (requires active cooling) |
| Use Case | Small home grow, 2-4 plants | Single plant, budget setup | Large tent, commercial yield |
The Cosmos 150W sits right between entry-level and professional. If you're running a small personal grow and you want actual full spectrum light — not just blue and red LEDs pretending to be full spectrum — this is where we'd point you. The Lumatek Zeus is a beast, but it's overkill (and over-budget) for a 60x60 tent. The blurple panels are cheap, but you'll see the difference in your harvest.
In a 60x60cm tent, two plants comfortably. In an 80x80cm tent, three to four smaller plants or two larger ones trained with LST. Beyond that footprint, light intensity drops off and you'll see diminished results at the edges.
Yes. It has switchable modes — a veg setting that pushes more blue-spectrum light for compact growth, and a bloom setting that emphasises red wavelengths for flowering. You don't need separate panels for each stage.
Start at 45-50cm for seedlings, drop to 30-40cm during active vegetative growth, and bring it to 25-35cm during flowering. If you see leaf tips bleaching or curling upward, raise the board a few centimetres.
For a 60x60 to 80x80cm tent, absolutely. You're looking at roughly 30-50 watts per square foot in that range, which is within the recommended zone for LED-driven grows. Larger tents need more wattage — either a bigger panel or multiple boards.
At 18 hours per day (vegetative cycle), it draws about 2.7 kWh daily — roughly 81 kWh per month. At 12 hours per day (flowering), that drops to around 54 kWh per month. Significantly less than a comparable HPS setup.
You can, but you'll lose a lot of light. A reflective tent interior bounces photons back onto the canopy. Without it, light scatters into the room and your plants get maybe 60-70% of the board's output. We'd always recommend a tent for efficiency.
Not particularly — 150W LEDs produce far less heat than HPS or MH bulbs. But in a sealed small tent with no airflow, temperatures can still climb. An extraction fan is not optional. Keep your tent below 28°C for best results.
Last updated: April 2026
