As air cooled goes these are really good quality . tonka toy strength and a usuable lamp replacement system can cope with 600w ballast and bulb .
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Not that bad
Twice the Power and Efficiency of Most Other..
Omega Lighting kits, are regarded as the best..
The Osram PLANTASTAR bulb is the only 600w..
Unit 8, Venture Business Park Weir Lane Worcester WR2 4GD