FYI. Caught my interest. I thought I would share. Thoughts? I haven't done any calculations or comparisons. I've read posts in the pasts where someone actually gathered strings of LED Xmas lights to go over their tanks - this would be a better method of doing that.
For LED, 3.5W for 270 Lumens = 77 Lumens Per Watt
For CF, 23W for 1300 Lumens = 56 Lumens Per Watt
So with the LED bulb you are getting a 37.5% efficiency improvement compared to CF.
Low powered LEDs - no comparison to the higher-powered LED, like Vince is doing.
(https://www.ovas.ca/forum/proxy.php?request=http%3A%2F%2Flh6.ggpht.com%2F_eUprgDB53xU%2FSuxW9OmJH6I%2FAAAAAAAACBo%2FrLhgFenkzi8%2Fs800%2Fphoto.jpg&hash=5de1b89d744cc5787bb5952a68a8c15bd36cf3e0)
(https://www.ovas.ca/forum/proxy.php?request=http%3A%2F%2Flh4.ggpht.com%2F_eUprgDB53xU%2FSuxW-jkRRfI%2FAAAAAAAACBw%2FIEaUBQ0-vfs%2Fs800%2Fphoto%25204.jpg&hash=9905437dc1bfc8a5a4b0178f0bbe79a3469657ff)
(https://www.ovas.ca/forum/proxy.php?request=http%3A%2F%2Flh6.ggpht.com%2F_eUprgDB53xU%2FSuxW_PK9_gI%2FAAAAAAAACB0%2FQWM4J_RLtQY%2Fs800%2Fphoto%25203.jpg&hash=c6249e182e217a27e88073187019a37c02d73676)
(https://www.ovas.ca/forum/proxy.php?request=http%3A%2F%2Flh4.ggpht.com%2F_eUprgDB53xU%2FSuxW_jmlweI%2FAAAAAAAACB4%2FV2ZpO7Xl6VU%2Fs800%2Fphoto%25202.jpg&hash=e112a1c08d1b981adfed87941e0679fecaf34c99)
this would not be good for growing anything but for a moonlight on a very large tank, high up.
Quote from: OttawaFolkFestivum on October 31, 2009, 11:30:43 AM
FYI. Caught my interest. I thought I would share. Thoughts? I haven't done any calculations or comparisons. I've read posts in the pasts where someone actually gathered strings of LED Xmas lights to go over their tanks - this would be a better method of doing that.
For LED, 3.5W for 270 Lumens = 77 Lumens Per Watt
For CF, 23W for 1300 Lumens = 56 Lumens Per Watt
So with the LED bulb you are getting a 37.5% efficiency improvement compared to CF.
Low powered LEDs - no comparison to the higher-powered LED, like Vince is doing.
(https://www.ovas.ca/forum/proxy.php?request=http%3A%2F%2Flh6.ggpht.com%2F_eUprgDB53xU%2FSuxW9OmJH6I%2FAAAAAAAACBo%2FrLhgFenkzi8%2Fs800%2Fphoto.jpg&hash=5de1b89d744cc5787bb5952a68a8c15bd36cf3e0)
(https://www.ovas.ca/forum/proxy.php?request=http%3A%2F%2Flh4.ggpht.com%2F_eUprgDB53xU%2FSuxW-jkRRfI%2FAAAAAAAACBw%2FIEaUBQ0-vfs%2Fs800%2Fphoto%25204.jpg&hash=9905437dc1bfc8a5a4b0178f0bbe79a3469657ff)
(https://www.ovas.ca/forum/proxy.php?request=http%3A%2F%2Flh6.ggpht.com%2F_eUprgDB53xU%2FSuxW_PK9_gI%2FAAAAAAAACB0%2FQWM4J_RLtQY%2Fs800%2Fphoto%25203.jpg&hash=c6249e182e217a27e88073187019a37c02d73676)
(https://www.ovas.ca/forum/proxy.php?request=http%3A%2F%2Flh4.ggpht.com%2F_eUprgDB53xU%2FSuxW_jmlweI%2FAAAAAAAACB4%2FV2ZpO7Xl6VU%2Fs800%2Fphoto%25202.jpg&hash=e112a1c08d1b981adfed87941e0679fecaf34c99)
The LEDs on this tank are also by Lights of America but they're a mini-flood style; about $9 at Wal*Mart. Crappy picture. The tank is not as yellow as it looks. Tank is 18" deep.
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Saltcreep - thanks for posting that info.