Yes for consumer point of view ;-) my friend build a new driver to control the current and voltage to control led, but this are for real hard core.

T5 or T8 is same florescent light. T5 come with electronic ballast, and T8 can be coil or electronic ballast. Performance t5 is better. Don't get China brand, need to get reputable brand.

This post has been edited by weikee: May 31 2012, 08:50 AM

Big does not mean bright. T5 is much brighter.

Real practical example, mad valley parking used to be t8, they change to t5, and during transition can see the difference, and now the parking is so much brighter. My mom house I replace the old t8 to t5, brightness is so much much difference.

Dimmer you have two option LED or halogen type. Led will be more expensive, halogen will be cheaper, but running cost is higher. Another forumer mention can use Pll light with special ballast, but I have not personally seen it before.

My house use t5 in the light box and within the light box area I put down light.

This post has been edited by weikee: May 31 2012, 10:32 AM

Yes two type, one is high output, is almost double the intensity of normal t5. Not sure is the edge is difference the output. Both is still better than t8.

I know because I play with aqua grass before, and light is very critical. T8 is on the phasing out mode.

Yes usually China made.

T5 will be better cause is lighter.

Price difference between cfl and led, than watt difference, calculate the difference, multiply by the hours you switch on. You know how much you saved, and multiply by month you know how much you save a month.

You should be able to rough out three ROI

Oh to be fair, you need to compare same lumen too.

Got round, slimmer T5

Still the best, reliable, value for money lights.

If want something smaller use pll light.

Go light shop and cc66 la. Than set your budget.

Brand?

A china unknow brand can be very cheap, 2 sometime 3 of china unknow brand is only equal to Brand like Osram, GE, etc..

My contractor did not even charge me. Only charge switch point.

What is the brightness per watt? Lumens/watt

Sometime it look like good replacement, but when put into replacement the performance does not meet up. For new installation is easier, just put more lighting Source. Eg for normal cfl the area need 4 downlight, with led will need 6.

9W LED = 850lm and with that price, you can go beat philip already. Even better than the Philips LUXEON I am having.

I don't need any LED now, as my house already using CFL, and T5 which i find is much brighter than the LED I can afford during renovation.

You saying 80% brighter than normal T5? You mean it produce 5220 Lumens?

If so I would like one for testing.

I am wondering too. If that is the improvement no harm buy one and try.

I can get my friend photography light meter again to test

Good for my fish tank too.

Not enough light source leh. My grass not green enough