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The full range
HPS, CDM and CFL grow bulbs
Bulbs are consumables — HPS and CDM lamps lose output gradually even before they blow, and most growers replace them every one to two grows to keep yields up. Keeping a spare in stock means a dead bulb mid-flower doesn't cost you a week's growth.
Our range covers the main types: Sylvania Grolux and Omega Dual Spectrum HPS bulbs (600W, dual spectrum for veg-to-flower in one lamp), Sunmaster 600W Metal Halide and SON-T lamps for growers running separate veg and flower spectrums, Philips Master GreenPower 600W as a premium dual-spectrum option, and Maxibright 315W Daylight CDM lamps for CMH fixtures. CFL bulbs cover low-heat propagation and small-space setups.
Choosing the right bulb
Match wattage to your ballast exactly — a 600W bulb needs a 600W-rated ballast, not a step down from 1000W. Dual-spectrum bulbs like the Sylvania Grolux or Omega Dual Spectrum are the simplest choice if you want one bulb for the whole grow; single-spectrum HPS or CDM lamps suit growers chasing a specific look in flower. See our ballasts and reflectors to complete the fixture, or browse HPS lights and CDM lights for the full ecosystem.
Free UK delivery over £99, Express Delivery available. Call 020 3488 0419 if you're not sure which spectrum fits your setup.