[Lab] smt low and high power LEDs - brightness

[Kyle Chisholm]

Hello,
I'm working on making a cool light fixture with an array of LEDs mounted on pcb and I'm wondering if anyone can tell me what type of brightness I can expect from medium/low powered LED (0.06W, 6.8 lumens typical luminous flux) versus high power LEDs (0.5W, 39 lumens OR 1W, 105 lumens)?
If I have an array of 4 or 36 LEDs, for example, how might that compare to 60W or 100W bulb(s)? 
Also the high powered LEDs have slugs and I'm wondering what is necessary for heat dissipation - do I really really need a heatsink for 0.5W or 1W LEDs?

I'm referring specifically to Everlight Optoelectronic components:
low mid-power

high power


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://artengine.ca/pipermail/lab/attachments/20130322/3d34e3de/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Screen Shot 2013-03-22 at 12.24.33 PM.png
Type: image/png
Size: 183970 bytes
Desc: not available
URL: <http://artengine.ca/pipermail/lab/attachments/20130322/3d34e3de/attachment-0002.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Screen Shot 2013-03-22 at 12.31.38 PM.png
Type: image/png
Size: 167251 bytes
Desc: not available
URL: <http://artengine.ca/pipermail/lab/attachments/20130322/3d34e3de/attachment-0003.png>