HI, I'd like to change the ballast and tube in my 2D bathroom light fitting from a 28W one to a 38W, to get more light.
I've seen ballasts on Amazon and I can get the bulbs anywhere. However, there are two versions of the ballast, one if rated 0.17A and the other 0.28A:
http://www.amazon.co.uk/Electronic-..._sbs_kh_1?ie=UTF8&refRID=02DN98PMQADAJGE85KFX
http://www.amazon.co.uk/Wired-Fluor...sbs_diy_8?ie=UTF8&refRID=0VEQ52D58M9FZ90AQJQK
Now by my maths, 0.17A x 230v = 39.1W ,so why do they offer the higher rated one if it's a 38W ballast?
Also, if there are better 38W ballasts, please advise.
Thanks
I've seen ballasts on Amazon and I can get the bulbs anywhere. However, there are two versions of the ballast, one if rated 0.17A and the other 0.28A:
http://www.amazon.co.uk/Electronic-..._sbs_kh_1?ie=UTF8&refRID=02DN98PMQADAJGE85KFX
http://www.amazon.co.uk/Wired-Fluor...sbs_diy_8?ie=UTF8&refRID=0VEQ52D58M9FZ90AQJQK
Now by my maths, 0.17A x 230v = 39.1W ,so why do they offer the higher rated one if it's a 38W ballast?
Also, if there are better 38W ballasts, please advise.
Thanks