lmsmith Posted April 25, 2009 Report Share Posted April 25, 2009 This isn't such a technical question as a practical one - where, apart from pet stores, can you buy these lights? Pref. in Welly where I can pick them up. Once I've decided what I'm getting, I'd rather not pay $50 in postage... Quote Link to comment Share on other sites More sharing options...
Ira Posted April 25, 2009 Report Share Posted April 25, 2009 Lamp specialists I think should. A lot of general lighting shops might be able to get some for you. Electrical suppliers... Quote Link to comment Share on other sites More sharing options...
HaNs Posted April 25, 2009 Report Share Posted April 25, 2009 Electrical wholesalers, but some dont stock the right MH's Quote Link to comment Share on other sites More sharing options...
suphew Posted April 25, 2009 Report Share Posted April 25, 2009 Try "the light bulb man" Quote Link to comment Share on other sites More sharing options...
lmsmith Posted April 25, 2009 Author Report Share Posted April 25, 2009 Who's the light bulb man? Quote Link to comment Share on other sites More sharing options...
suphew Posted April 26, 2009 Report Share Posted April 26, 2009 He is the lightbulb man http://yellow.co.nz/companies/Lighting/Lightbulb-Man/100246967_1079.html Quote Link to comment Share on other sites More sharing options...
craigd Posted April 26, 2009 Report Share Posted April 26, 2009 You could try the switched on gardener, they sell metal halide not sure about the t5...though see them on trademe search for seller boxturtle. Cheers Quote Link to comment Share on other sites More sharing options...
HaNs Posted April 27, 2009 Report Share Posted April 27, 2009 Iv got 2 6500k 150w metal halides here, wanting to sell my last 2 as im going to 70w bulbs Quote Link to comment Share on other sites More sharing options...
lmsmith Posted April 27, 2009 Author Report Share Posted April 27, 2009 How do they go for power usage vs T5s? Quote Link to comment Share on other sites More sharing options...
Ira Posted April 27, 2009 Report Share Posted April 27, 2009 How do they go for power usage vs T5s? 250 watts of metal halides uses pretty similar an amount of power to 250 watts of T5s. Quote Link to comment Share on other sites More sharing options...
Simian Posted April 27, 2009 Report Share Posted April 27, 2009 *sigh* Here we go opening another can of worms The Efficacy (lumens per Watt (lm/W)) of a metal halide varies considerably but typical figures are around 80-90 lm/W High efficiency T5 lamps are up to 104 lm/W High Output (HO) T5's are much less than that (sorry no data sheets on hand) If you are concerned with operational costs, most metal halides still run with electromagnetic ballasts which are v inefficient. The lumen Maintenance of a T5 tube is better than a metal halide with output dropping down to an impressive 90% at 15,000 hrs. The lumen maintenance of a MH lamp will drop off more but life expectancy is very variable depending on type of lamp, supply voltage etc Quote Link to comment Share on other sites More sharing options...
lmsmith Posted April 27, 2009 Author Report Share Posted April 27, 2009 So.....T5s are better? Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted April 27, 2009 Report Share Posted April 27, 2009 t5's produce brighter light per watt. (i think) you cant compare t5's to MH's cause they both use different amounts of power in Watts. basically it seems you get more bang for your buck with t5 HO's. the standard 4ft T5 HO tube is 54W, and you need 2 of them = 108 Watts. that's the power consumption. MH's Watt rating depend on the individual bulb. HTH Quote Link to comment Share on other sites More sharing options...
suphew Posted April 27, 2009 Report Share Posted April 27, 2009 *sigh* Here we go opening another can of worms The Efficacy (lumens per Watt (lm/W)) of a metal halide varies considerably but typical figures are around 80-90 lm/W High efficiency T5 lamps are up to 104 lm/W High Output (HO) T5's are much less than that (sorry no data sheets on hand) If you are concerned with operational costs, most metal halides still run with electromagnetic ballasts which are v inefficient. The lumen Maintenance of a T5 tube is better than a metal halide with output dropping down to an impressive 90% at 15,000 hrs. The lumen maintenance of a MH lamp will drop off more but life expectancy is very variable depending on type of lamp, supply voltage etc So there is about 10-15% difference, I think you would be lucky to be able to see any difference, and beyond a doubt the quality of the reflector would make a far bigger difference. IMHO for the purpose of calculating light in a tank take them as being the same. Quote Link to comment Share on other sites More sharing options...
lmsmith Posted April 27, 2009 Author Report Share Posted April 27, 2009 Thanks everyone. Very helpful :bounce: :bounce: Quote Link to comment Share on other sites More sharing options...
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