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Generic 600w eBay led, go by actual watts to replace HID. IE replace 600w with 600w of low efficiency leds. You'll still cut down on temps and save on bulb replacements, but if you want to cut watts at the wall you'll need to spend a little coin. Generally if the led doesn't give you it's total light output in some way then assume it's low efficiency epi leds. (Ppf, ppfd over an area, umol/j (then times wall watts for ppf), even lumens for white light. Do be weary of single point measurements, this is often misleading "over 80,000 lux at 12 inches!" Means nothing
Something like 4-5 of these to replace a 600w. I like multiple smaller units as you get the benefit of a better spread too.
http://m.ebay.co.uk/itm/Mars-300-LE...rum-Panel-for-Plants-/321684002218?nav=SEARCH
Or to cut wall watts, DIY is best without breaking the bank, and I'm not sure what's available in the UK commercially. You need ~800ppf to replace a 600w. And up to 1100 would match an unreflected brand new bulb.
Something like 4-5 of these to replace a 600w. I like multiple smaller units as you get the benefit of a better spread too.
http://m.ebay.co.uk/itm/Mars-300-LE...rum-Panel-for-Plants-/321684002218?nav=SEARCH
Or to cut wall watts, DIY is best without breaking the bank, and I'm not sure what's available in the UK commercially. You need ~800ppf to replace a 600w. And up to 1100 would match an unreflected brand new bulb.
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