Lighting Effects
Aquarium Lighting - Metal Halide - Saltwater Reef - Effects and Precautions?
I've got a 24 gallon saltwater reef tank, and I just got in the mail my new 250 watt metal halide system (15,000k). Prior, I've been using a 120 watt compact fluorescent system. My question is what special precautions should I be mindful of as I install this new system:
- Heat?
- UV penetration effecting the health of the fish?
- Dangerous effects from the light on people (the light will be hanging from the ceiling and will be in a living room)?
- Any other concerns?
Thanks.
You'll need to replace the bulbs quite often. Typically, every nine months to a year or so.
Heat is a HUGE issue. You'll need to ensure good fans keep it cool. Monitor your water temp regularly because the lights will heat up the water (especially a 24 gallon tank). Noise will definitely get annoying. The fan motors can get quite loud if the tank's in your living room.
Algae will also become a factor since the lights will definitely promote more growth.
Don't forget that you are controlling the "sun" for the tank so you should consider putting it on a regular cycle so the fish and coral get used to a set schedule.
Water evaporation will happen quicker now, so your salinity levels should be closely monitored too.
Safety issue: I would refrain from running the light when you're not home. Treat it like your dryer... typically its safe, but you never want to leave it unmonitored due to fire hazzards.
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Laserpod Supernova, lighting effects, findmeagift.com
Can you take a photo taken during the day, and make it night whilst adding lighting effects ?
Basically, im trying to do a mockup of what a certain site would look like with certain lighting for a big event.
The photos are taken in the day time. I want to add lighting to this photo and make it look like it's night, with the lights illuminating the buildings in the correct way, angle etc...
Any ideas ?
Pref using photoshop cs3
This gives you a step by step tutorial to make photo's from day to night using Photoshop:
http://www.photoshoptalent.com/photoshop-tutorials/day-to-night.php
Hope this helps 
