FREE DELIVERY* ON ORDERS OVER £99 ·  SAME DAY SHIPPING ON ORDERS PLACED BEFORE 2PM ·  PRICE MATCH PROMISE

Sunmaster

400V Lamps

£44.95

Online price · 10% online discount included

£44.95

Online price · 10% online discount included

In stock

Order by 2pm Mon–Fri for same-day dispatch

Straight to checkout: card, PayPal, Apple Pay, Google Pay or Klarna

Seen it cheaper? Ask for a price match

Found it for less at Amazon or another UK shop? Send us the link. If we agree, we beat their price by 2% on our website for 24 hours and email you to say so. Not eBay listings.

For: 400V Lamps – Grolux Dual Spectrum

Or WhatsApp us on 07758 144177. We reply within one working day, usually much sooner.How it works

Description

400V Grow Lamps are the next generation of HID lights and output around 10% more usable light than standard 240V grow lamps, that are currently in use.

They require a different ballast to power them - we currently sell the Maxibright Promax Gold 600W/400V ballast with other models expected to follow in the coming months.

You can dim these lamps in the same way as you would a normal 240V lamp, the main difference is just the enhanced PAR output. They cost a bit more than 240V lamps at the moment. As they become the norm in the grow lighting industry, expect the prices to drop to about the same level.

***Please retain original packaging for your lamps to validate the 12 month warranty***

Key facts

Type400V HID grow lamp
VersionsGrolux Dual Spectrum, Philips GreenPower and Sunmaster Dual Spectrum
LightAround 10% more usable light than a standard 240V grow lamp
BallastNeeds a 400V ballast, not a standard 240V one
DimmingDims in the same way as a 240V lamp
Warranty12 months; keep the original packaging to validate it
BrandSunmaster
SizesGrolux Dual Spectrum, Philips Greenpower, Sunmaster Dual Spectrum
CategoryHID Lighting

How to use

A 400V lamp will not run on an ordinary 240V ballast. Check your ballast is a 400V model before you buy. Once fitted, it dims in the same way as a 240V lamp.

Keep the box: the 12-month warranty depends on the original packaging. Standard 240V lamps are in HID lighting.

Questions

Can I use a 400V lamp with my existing ballast?

Only if it is a 400V ballast. A standard 240V ballast will not power it.

What is the difference from a 240V lamp?

Around 10% more usable light. Otherwise it is used and dimmed the same way.

Is there a warranty?

Yes, 12 months, as long as you keep the original packaging.

Growers’ guides

£44.95