Quote:
Originally Posted by milou
I have 4 x 39 w T5 HO and need to add 2 more T5 to make it 6 bulb. what do I need?
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Ok i see what you mean now by retrofit.
yes if you want to add two more bulbs you will need a room for two more bulbs in the fixture and a ballast that will drive these extra bulbs.
or
If you have a canopy then you will also need a reflector or individual reflectors in addition to the extra ballast and bulbs.
hth