HID Lighting
HID grow lighting: HPS lamps for flowering, metal halide for growth, 315W Philips CMH, 400V lamps, ballasts and reflectors including the Cool-tube. Sunmaster, Osram, Philips, Grolux, Hortiking and Powerplant lamps in 400W, 600W and 1000W.
In StockHighlight
£17.96
In StockMaxibright
£62.96
In StockMaxibright
£53.96
In StockSunmaster
£22.46
In StockSunmaster
Sunmaster 600W Metal Halide Lamp
£44.96
In StockSolDigital
SolDigital Super Metal Halide 400w
£13.91
In StockSunmaster
£58.50
In StockGarden HighPro
£35.96
In StockPowerplant
£13.46
In StockPhilips
£28.76
In StockGrolux
£18.86
In StockSunmaster
£26.96
In StockHortiking
£13.46
In StockMaxibright
£15.71
In StockOsram
£17.96
In StockSunmaster
Sunmaster 400W Metal Halide Lamp
£26.96
In StockPhilips
£89.96
In StockSunking
£39.56
About HID Lighting
HPS, MH or CMH?
High pressure sodium (HPS) is the flowering workhorse: red-heavy, bright and cheap to run. Metal halide (MH) is bluer and keeps plants short and leafy in growth. Grolux dual-spectrum lamps cover both stages from one lamp. Ceramic metal halide (315W CMH) gives a fuller spectrum and more light per watt than either, and runs on its own ballast.
400V lamps, run on a compatible digital ballast, give the most light per watt of any HID lamp and hold their output for longer.
Reflectors
The Cool-tube Reflector puts the lamp inside a glass tube you connect to your ducting, so the heat leaves the tent before it warms the room. The Euro reflector is the standard open hood, and the Sunking Parabolic spreads light widely for bigger areas.
Lamp life
HID lamps fade long before they fail. Change lamps after about a year of use even if they still light: output drops well before the lamp goes. Many growers now add an HPS to an LED for the middle weeks of flowering: read why the best growers use LED and HPS together and LED grow light wattage by tent size.
Growers' Guides
- LED Grow Light Wattage by Tent Size (and LED vs HPS)How many watts of LED a tent needs: 300-500 W/m² in flower, a table by tent size, the Maxibright, Gorilla and Adjusta-Watt fixtures that fit, and LED vs HPS.
- LED or HPS? Why the Best Growers Use BothTom's view from twenty years in the shop: run LED as the main light and add a dimmable HPS, metal halide or CMH for flowering weeks 3-7 for a better finish.