poomoon

bombarded, nah. yes of course, as i know he said 20k is considered acceptable depending on certain conditions that the maintenance reaches that level. but i did hear from him saying most claim 40-50k

hi, my BF travelling now, he's the one who wrote that. Not sure were from, but I dot think it is from manufacturer, not sure if it's like a general thingy. I'll check with him. Wow my minds is being bombarded with so much info already.

hehe ok thanks. yup.

question : between these shades of blue, does it bring out the natural coloration, or enhance ?

ohhh ... well, drew what he meant : point A is like zero time, and point B is another time B. at time B, the blue line (MH) is low already, while LED (red) is still high. if you now take the total from point A to B, the gab between A and B is how much more you'd get from the LED across that period. Compare.bmp

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haha, time specific - period >> meant the same. yes, i think it's because of what i mentioned above. and of course, LED's cooler ... not only temperature, also how they look

not sure about the wattage comparison, i assume this is taken across time. since if you compare MH and LED maintenance, the % degradation for MH is about 30 degrees slope declining based on a certain operating life (so about 70% maintenance), well as for LED you would only see less than 1-2 %, thus in average you are transmitting more. that is also why across the same time, due to the output drop, the MH output (even originally higher than LED) will be equivalent or even lower than the LED output.

hehe, sorry my BF also no expert, just sharing his 2 cents, he used to work in optics engineering . the PAR you mentioned is related to wavelength and transmissibility that the plants need to start photosynthesis. water even a very clear one can reduce even 50% or more, but usually this is talking about great depths (say 20-30m), but also depends on the wavelength. blue light is normally used since it has a short wavelength and typically decrease maybe less than 1% in clear water about 1m depth. in salt water, you have all these particles plus the surface itself which adds to deminishing transmission. Plus how high is your fixture from the water level is, which is more on transmission coverage.

yup, typically manufacturers will claim lumens maintenance of up to 20,000 to 50,000 hours, considering ideal conditions. but we know in reality a lot of other factors step in

120 degree optics will be over 85% transmission. below 90 degrees will give over 90% transmission. consider light deminishing with depth (due to scatter/ bending / diffusion) but normally this is in "metres", so probably not much for the aquarium tank - also from my BF

70% lumen maintenance is typically acceptable within 20,000 hours of use, for general lighting, 80% for more stringent requirements. Hi-LEDs are at around 3-5% lumens maintenance drop every ~5,000 hours of use. it would also depend on the ambient and lighted temperature conditions in the system, of course higher temperatures will degrade this performance further. -- just quote from my BF

made in china, so should be cheap, just hope the quality is good. Looks good and sturdy though ...

isn't this the one that Jacky just got ?

yeah this one easily $6xx to $8xx i think ....

wow .... set it up set it up light it up light it up pic pic pic

try defender first if it can removed it ...and by the way, sis not bro

hehe i started with the available free ones ... if you got norton or mcafee, then better

try running windows defender or lavasoft adaware, they should be able to detect and quarantine these

definitely spam ... malware !

very much true, that's why i said, will see how next year, hopefully still ok thanks, at least i know what to expect. as early as now we talk about those stuffs already. at least one thing's for sure, i like ta have a reef tank (however size it is), just nice looking at em.

haha ... well, i also tell my BF to "take it easy" on the pockets on reefing, but i don't ask him to stop, just like give him a reality check, so far it's working for us, he does the same with me. he's quite spontaneous ... sees this sees that ... nice prata, nice mushroom ... i tell him we don;t have the new tank yet, so he says then we get it and set-up already, and i remind him better to do it in the new house ... that kinda thing, so i'm still able to keep him at bay. me, haha similar ... ohhhh cute goby ! can i have more clowns ? so he reminds me also. well, priorities are priorities, but i also don't forget what he always reminds me - take some time to enjoy what we want to do to have fun, and not just the things we have to do. so other than children and family (of course that is tops !), also some fun things like this reefing ... and good thing, i'm getting to like it somehow, but more on just looking and feeding for now hehe. i do help out sometimes when he needs to do something before like topping up or scaping, kinda fun also to see the results later. we gals are one of the most complicated species haha ... but we can be simple and understanding also ... and i'm sure, your wife is one as well

that's why jacky i'm shy to post my tank yet ... too small really a nooby tank

yeah, i'm lucky also ohh ... well, plan to settle down next year, so the big tank is planned for the new house ... no promises, but at least both of us seems committed to maintain a reef ... we'll see how it goes so now, your wife don't really mind about your reef ?

haha, noth of us, "our" money ... he always tell me "what's his is also mine", same for me he used to few years back, after bad crash, he stopped, but he is also a nooby. so now just thought of starting again, and since i also wanted, he helped me set up a small tank in my room he plans to set-up again next year a bigger tank, so now just testing again.