Lumatek 400W Digital Ballast by Lumatek — Dimmable HPS & MH Grow Light Ballast
LUM-LGT-BALLAST-400W
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Pairs well with
The Lumatek 400W Digital Ballast (LK4240) runs both HPS and MH lamps on a standard 240V circuit, with dimmable output for 250W and 400W globes plus a Super Lumens switch that pushes roughly 10% more output from your lamp when you want it. Compared to an old magnetic ballast you get up to 30% more lumens, silent fanless operation and far less waste heat — the sensible upgrade for any single-lamp HID setup.
Specifications
- Only engage the Super Lumens switch on HPS lamps — Lumatek advises against using it with MH globes.
- Always match the output setting to your lamp. Never run a 250W globe on the 400W setting.
- Mount the ballast off the floor with airflow around the fins — cooler electronics last longer.
Getting Set Up
Pairs Well With
Pair with a quality 400W HPS for flower or MH for veg.
HID Grow LightsReflectors and shades to put every lumen on your canopy.
More From LumatekLamps, controllers and gear from the digital ballast specialists.
Frequently Asked Questions
Does this ballast run both HPS and MH lamps?
Yes. The LK4240 runs both high pressure sodium and metal halide lamps, so you can use MH for veg and swap to HPS for flower on the same ballast.
Can I use the Super Lumens switch with a metal halide globe?
No. Lumatek advises the Super Lumens boost is for HPS lamps only. Run MH globes at their rated setting.
Is it noisy?
No. There is no fan and no magnetic hum — the graduated fin housing cools the unit passively, so it runs silent.
Will it work on a normal Australian power point?
Yes. It is a 240V, 50/60Hz unit drawing 1.75A, so it plugs into a standard Australian outlet.
What warranty does it carry?
This model carries a 3-year full warranty from Lumatek, with resin-coated internals and an external breaker protecting it against power surges.
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